African Population Studies
Union for African Population Studies
ISSN: 0850-5780
Vol. 10, Num. 1, 1995
African Population Studies/Etude de la Population Africaine, Vol. 10,
November/novembre
1995
Determinants of Fertility
Decline in Botswana
S. Kwesi Gaisie
Code Number: ep95003
INTRODUCTION
Botswana exhibits a medium fertility rate (i.e.4.0-5.0 births per woman).
One of the three countries in sub-Sahara Africa (Kenya and Zimbabwe are the
other two) reported to be experiencing incipient fertility decline, an indication
of the subcontinent's entry into the second phase of the fertility transition
after undergoing significant changes in the proximate determinants of fertility
over the past few decades. The magnitude and socioeconomic and demographic
determinants of the declines in the three countries have become major preoccupations
of researchers. This article examines some aspects of these topical issues
in relation to fertility trend in Botswana. It also draws attention to the
need to develop intellectual capacity for studying these phenomena and provide
adequate and reliable information and appropriate tools for monitoring and
evaluating demographic trends in the sub-continent.
Fertility Decline:
Evidence
The reported completed family size based on age groups 40-44 and 45-49 shows
that fertility has been declining since the past decade. Birth cohort analysis
also shows that completed family size has declined from 6.5 children per woman
among the 1932-1936 cohort to 6.1 among the 1942-1946 cohort. The fertility
trend may also be gleaned from the reproductive performance of birth cohorts
at the successive age groups. For instance, 1942-1946 and 1952-1956 cohorts
had the same average parity (2.8) when they were 25-29 years old but the younger
cohort (1952-1956) had 0.6 children fewer than the older cohort (1942-1946)
in the age group 35-39 years: 4.6 versus 5.2.
Figures for the 1947-1951 and 1957-1961 cohorts reflect similar trend in fertility:
though the younger cohort had a slightly higher average parity in the age group
20-24 (1.5), its average parity in the age group 30-34 was 3.5 as compared
with 4.2 for the older cohort. The reported total fertility rates of 6.1 (1981
census) and 3.7 (1991 census) are also indicative of a decline, the extent
of which may have been exaggerated by reporting errors. However, the reported
completed family size suggests that fertility has declined by between 6 and
10 per cent or between 0.6 and 0.7 children per woman over the past decade.
Another indication of fertility decline is the lower parity progression ratios
at higher orders for the younger birth cohorts (i.e. 1941-1945 and 1946-1950
cohorts) as compared with that of the older cohorts. Analyses based on the
Relational Gompertz Model and data from the 1981, 1991 censuses and 1988 BHS
11 yielded TFRs of 6.4 (1981), 5.7 (1988) and 5.1 (1991) (Udjo, 1994). Another
set of estimates based on Brass P/F Ratio Method and Brass type methods of
comparing period fertility rates with average parities for a hypothetical cohort
produced TFR of 7.1(1981 census) and 5.3 (1991 census) (CSO 1987; Adegboyega
1994). Both sets of estimates show that TFR of 5.2 is a plausible figure for
the period preceding the current decade (1990s). However, a TFR of 7.1 for
1981 is on the high side, bearing in mind that in Southern Africa (e.g. Botswana
and Lesotho) relatively late marriage, high widowhood and divorce that are
not rapidly followed by remarriage and a long post-partum non-susceptible period
together with low proportions of childlessness have produced general fertility
levels that are on the low side by African standard (Lesthaeghe 1987). A TFR
in the neighbourhood of 6.4 or 6.5 is compatible with the nuptiality and child-spacing
patterns and levels of sterility and sub-fecundity during the late 1970s and
early 1980s. Fertility level therefore appears to have remained fairly constant
during the 1970s with TFR of 6.5 (see Report on the Population Census 1971;
CSO 1972) and began the downward trend in the late 1970s and the 1980s with
the TFR dropping to 5.7 in 1988 and then to 5.2 in 1991. These estimates show
that fertility declined by 11 percent between 1981 and 1988 and by 8.8 percent
between 1988 and 1991 or a decline of about 19 percent during the past decade,
higher than the 10 per cent decline which is now "conventionally accepted as
indicating an onset of irreversible fertility transition" ( Caldwell et. al.
1992:211).
Impact of Labour Migration on The Family Structure
Mine labour migration from Botswana accounted for one-quarter of the adult
males aged 15-34 years from the 1940s to 1970s. And according to Cobbe (1983),
one-third of the labour force was employed in South Africa. Together with missionary
activities and contacts with European traders, labour migration engendered
many changes in the Tswana family. The closely knit cooperative socioeconomic
unit was transformed into economic dependency and became judicially and administratively
dismembered (Schepara 1947). Among the various factors labour migration was
the most ruinous. Though it contributed to the general welfare of the people,
it undoubtedly weakened the family structure. It separated husbands and wives
for long periods of time, leading to the break-down of domestic control and
children were reared in often socially inappropriate environments. Labour migration
also gave rise to spread of infectious diseases and laxity of sexual morals.
Schapera (1947:129) observed that "It is possible however, in view of the material
tabulated above, that even more children would be born were it not for migration ".
The disorganization of the family and associated changes in sexual and reproductive
behaviour contributed a great deal to the breakdown of the institution of marriage.
In the olden days, the young women generally married soon after the initiation
ceremony. In other words, they married when they were young and according to
Schapera (1971:32), "Extremely few people never married, as marriage offered
social status, companionship, economic cooperation and, for men, legal paternity
of the children". Pre-marital sexual relations were strongly discouraged and
reprehended. If lovers were caught, they were punished. "In no case is premarital
pregnancy found to occur without coming under the ban of the community "(Schapera
1933:61).
By the 1970s marriage patterns had changed substantially, due primarily to
the impact of labour migration. Marriage was delayed until a later age. Young
women had to wait several years after puberty before they were married. The
average age of marriage for the men ranged between 25 and 30 years and that
of the young women from 19 to 26 years. Some were never married at all though
they would prefer to marry and they remained as "Mafetwa- those who have been
passed by". It was among these women that the married men often found their
concubines (Schapera 1933: 86). Despite delayed marriage, courting relations
and love affairs flourished. Decline of polygyny did not allow the single women
to marry; proportion of polygamous marriages in Kgatleng district, for example,
fell from 43 per cent in 1850 to 30 per cent in 1880 and to 4 per cent in 1932
(Schapera 1971:87). Nobles initiated between 1830 and 1860 married an average
of 3.3 women and commoners 1.9 women. Since then such marriages became less
and less common and men initiated after 1920 married, on average, 1.1 women
(Kuper 1985). The inability to fall back on polygyny as an adaptive mechanism
led to many female headed households.
Proximate Determinants
The reported long duration of post-partum abstinence of 13 months as compared,
for example, with 4 in Zambia, 6.5 in Tanzania, 4 in Uganda and 7 months in
Mali (DHS1993, 1989), is not due largely to the absence of the husband as reported
in the literature for the country as a whole. In the 1984 survey, 51 per cent
of the women thought that it was customary for a woman to abstain for up to
six months while 36 per cent and 13 per cent intimated that the period should
customarily be between 7 and 12 months and 12 months or more respectively (C.S.O.
1985:86-89). The median duration of breast-feeding is reported to be 19 months:
18.9 months (BFHS 1 1984) and 18.8 months (BFHS 11 1988), ith the result that
the general non-susceptible period increased to the level of 16 months (CSO
1988:18), which is well above that of the Western, Central and Eastern African
countries with relatively long post-partum taboo.
Traditionally, sub-Sahara African organizational structures encourage optimal
exposure period which is adjusted through child-spacing systems or traditional
preventive checks. These two variables operate in the opposite direction to
influence fertility. In Botswana the general exposure period has been further
delimited by labour migration.
Thus, delayed marriage with attendant relatively high age of marriage, most
time lost due to widowhood and divorce not immediately followed by remarriage,
a long post-partum non-susceptible period (substantially influenced by abstinence)
and fairly low proportion of childlessness (about 5 per cent) have conjointly
produced a general fertility level that was on the low side by African standards.
The impact of these proximate determinants has been quantified as the number
of births per woman. Major effect is exercised by post-partum non-susceptible
period which reduces the number of births per woman by 4.84 births followed
by contraception with 2.45 births and marriage patterns by 0.74 births ( National
Research Council 1993 ).
Nuptiality Patterns and Fertility
As noted above, political, social and economic changes arising out of the
capitalist penetration of the Tswana society over the past four or five decades
gradually transformed the traditional nuptiality patterns of early and universal
marriage into different types of sexual unions and relationships. The family
that used to be an all-embracing unit - reproductive, economic and ritual -
and the extended family that operated as an economic, emotional and social
insurance corporation were dented by the social and economic changes. In Botswana,
labour migration triggered off this process and made inroads into the traditional
family structure with deep transformations in the nuptiality patterns.
According to the results of the 1991 census, 56 per cent of the females aged
12 years and over had never been married, 24 per cent were married and 11 per
cent were living with their partners. The corresponding figures for those aged
15 years and over are 50, 27 and 12 percent. The proportion never married among
the females aged 15 years and over increased from 37 per cent in 1971 to 44
per cent in 1981 and rose to 50 per cent in 1991. However, the proportions
of never married females of childbearing age (i.e. 15-49 years) were much higher:
44 per cent in 1971, 54 per cent in 1981 and 58 per cent in 1991. Thus, in
1991 childbearing among six out of ten females occurred outside unions.
Similar nuptiality patterns are noted among the males except that the proportions
never married are higher among those aged less than 35 years and the proportions
married are higher among the older males (i.e.40-49 years). The tendency to
live in a non-formalized union is therefore greater among the males aged 30-44
years. The proportion of those cohabiting rises from 18 per cent among 25-29
year-olds to a peak of 24 per cent in the 30-34 age group and then drops to
19 per cent in the 45-49 age group.
Overall, a significant feature of the nuptiality patterns is the high proportion
of both men and women of the childbearing age who are either never married
or are in socially unrecognized union. Among the major factors that shaped
the prevailing nuptiality patterns are abandonment of polygyny, labour migration,
formal schooling, and certain legal structures relating to rights to property
and credit etc. These have given rise to certain social, economic and moral
factors and behavioural choices that are systemic; extending the period of
the marriage process, increasing its complexity and determining marriage strategies.
One major observation is that it appears women in Botswana are educating themselves
out of the marriage market. Gulbrandsen points out that "legitimization of
the status of the unmarried mother may stem from the fact that high status
women are often in the category of women who remain unmarried mothers... For
instance, numerous female teachers remain unmarried, stating explicitly that
they are doing so rather than being beaten by a foolish, illiterate husband" (Gulbrandsen
1986; 21).
Data from the Demographic and Health Surveys conducted in sub-Sahara Africa
indicate that "high levels of education appear to be associated with greater
prevalence of "outside marriages" as well as with more premarital sexual activity" (National
Research Council 1993:63). For instance, in Botswana the proportion of women
aged 20-24 years who engaged in premarital sex during their teenage years rose
from 67 per cent among the uneducated women to 81 and 85 per cent among those
who completed primary and secondary/higher education respectively.
As noted earlier on, childbearing outside unions has greatly affected the
level of fertility. For instance, if all births were occurring within unions,
the TFR would have dropped to 2.6. by now. Notwithstanding, the extant nuptiality
patterns have also had some negative influence on the level of fertility. The
impact of non-marriage or non-union on the level of fertility may be gleaned
from the cross tabulation of reported average parity by age and marital status
(see table 2). Average parities by age are lowest among the never married women
who are the largest single group in the childbearing age brackets: 58 per cent
of all women in that age range. Average completed family size does not rise
above 5 children as compared with between 6 - 7, 5.6 - 6, 6 and 5 - 5.8 among
the married, "living together", widowed and divorced/ separated, respectively.
The average parity of the married women is larger by nearly one child among
the 20-24 and 25-29 year-olds and by about 2 children among the 40-44 and 45-49
year-olds than among their counterparts who are never married.
The current fertility data reflect virtually the same fertility pattern. One
half of the births recorded in the 1991 census occurred outside unions (i.e.
among never married women); 29 and 19 per cent of them were borne by married
women and those living with their partners respectively. Distribution of births
by age of mother unearths interesting patterns. Among the never married women,
the bulk of the births (80 per cent) occurred to mothers aged below 30 years;
59 per cent were children of girls in their teens and young women in their
early twenties. Among the married women, the concentration is in the 25 - 39
years age group (70 per cent) and among those living with their partners 20-34
year-olds contribute the largest number (71 per cent). Childbearing among the
never married women is therefore dominated by the youth (15 - 24 years age
group).
However, the timing measure - mean age of childbearing ( m ) - suggests that
the never married women tend to start childbearing at later ages than those
who are married and living with partners. The mean ( m ) of the age specific
fertility distribution of the never married women is higher (30.5 years) than
that of the latter groups - 28.6 years and 28.5 years respectively. The median
ages of childbearing reflect the same pattern - 24 years among the never married
women and 21.8 years and 22.7 years among the married and living the groups
living together, respectively. The relatively high mean age of childbearing
reflects, among other things, postponement of the initiation of childbearing
for a number of reasons including uncertainty about entering into stable sexual
union. Active sexual life is therefore pursued with some protection against
the risk of pregnancy.
The reported TFR for the never married women is lower than that of the other
marital groups by 27 per cent: 2.7 and 4.3 children per woman respectively.
However, if the TFRs or even the General Fertility Rates (GFRs) are standardized
for differences in age composition, level of fertility exhibited by the never
married women (TFR of 2.1) is about half that of the women in union (TFR of
4.4) and those "living together" (TFR of 4.5). The corresponding GFRs are 55.5,
118.1 and 118.4 children per 1000 women.
The extent of restriction of family size is reflected in the relatively low
probabilities among the never married women of bearing a fifth or a sixth child.
There is therefore a greater tendency among women outside unions to limit higher-order
births by effective practice of contraception.
The reproductive behaviour is examined further with data on number of children
ever borne by parity. All the computed parity progression ratios (PPRs) for
the birth cohorts of the married women are higher than that of the never married
women. The analysis shows that there is greater tendency among the women outside
union to restrict child bearing (figures not shown). This phenomenon is also
clearly reflected in the parity progression ratios for the youngest birth cohort
(i.e. 1966-1970). For instance, the probability of a married woman bearing
a second child has declined from 97 per cent among the 1946-1950 birth cohort
to 65 per cent among the 1966-1970 birth cohort; the corresponding figures
for the never married women are 92 per cent and 37 per cent. Though the PPRs
do not reflect the final fertility of the 20-24 year olds, the greater probability
among the never married women to limit family size at higher birth orders is
firmly established. Notwithstanding differential under-reporting of births
that may affect the levels of fertility noted above, the impact of the reproductive
behaviour on the general fertility of the never married women who constitute
the bulk of the women of childbearing age on the general level of fertility
in the country cannot be overemphasized. The fertility differentials among
the marital groups under discussion are suggestive of effects on fertility
levels by the prevailing nuptiality patterns - e.g. age at marriage and proportions
of women in unions.
Though Singulate Mean Age at Marriage (SMAM) increased from 24.8 years in
1971 to 26.2 years in 1981 and marginally to 27 years in 1991, age at marriage
does not seem to have any significant impact on the general level of fertility
since the majority of women bear children outside unions. The median age at
marriage is higher than the median ages at first sexual intercourse and first
birth by 7 and 5 years respectively; a strong indication of the fact that age
at marriage is not closely related to childbearing.
Proportion of single females at ages 15-19 years is usually regarded as a
good indicator of age at marriage. Table 2 shows that the proportion single
has always been higher than the proportion childless at ages 15-19 years, indicating
a weak relationship between age at marriage and proportion having children
(see Table 1). The same table shows that though there have been significant
increases in the proportions single at ages 15-19 and 20-24 years over the
past two decades, there has been little change in the number of children ever
born. Thus, age at marriage is not a good index of exposure to the risk of
childbearing and neither reflects the beginning of exposure in the society
under study.
Degree of exposure and frequency of sexual intercourse are therefore two of
the crucial underlying factors of fertility differentials noted among the various
marital groups. The results of the 1988 BFHS II show that among the 53 per
cent of the women interviewed who had never been married, 85 per cent had ever
had sexual intercourse; the proportion rises from 64 per cent among the 15-29
year-olds to 98 per cent in the 20-24 age group and 100 per cent among the
older women. However, the proportion of women who had sexual intercourse in
the month preceding the survey is higher (70 per cent) among the women in unions
than among the never married (47 per cent) and those who were formerly in unions
(46 per cent). The proportion among the married increases from 65 per cent
in the 15-19 age group to 74 per cent among the 45-49 year-olds whereas that
of the never married climbs up from 41 per cent among the 15-19 year-olds to
a peak of between 57-59 per cent in the middle of the age range and then drops
to 37 per cent in the oldest age group (45-49 years). The never married therefore
are comparatively less sexually active than the other marital groups and variations
in degree of exposure to the risk of childbearing among them may be inferred
from the survey results though we are not unaware of the limitation of this
type of information.
According to BFHS II results, 27 per cent of the never married as compared
with 32 and 29 per cent of the married women and those formerly in unions,
respectively were using family planning methods. Nearly all the never married
women were using modern methods: seven out of ten were using the pill while
the majority of the remainders were using either IUD or injection. Contraceptive
prevalence rates are higher among the young never married women (i.e. 20-24,
25-29 and 30-34 year-olds) than among their married counterparts. The older
women exhibit the opposite pattern. The BFHS II results suggest a greater tendency
among the young unmarried women to use modern contraceptives to avoid becoming
pregnant for a number of reasons including uncertainty regarding marriage and/
or stable unions, opportunities for schooling and employment while the older
married women use them to restrict family size. The relatively low prevalence
rates among the older never married women may be partly due to lack of exposure.
In fact, the reason given during the interview by the highest proportion of
non-pregnant women who were not using contraceptives method and who would be
unhappy if they became pregnant was "infrequent sex".
The contraceptive patterns have the greatest effect in the middle age group
(i.e.20-39 years); the years that childbearing is at its peak. Bearing in mind
that 58 per cent of the women of the childbearing ages are never married and
54 per cent of them are aged 20-39 years, nuptiality patterns and the level
of contraceptive use among the never married have the greatest inhibiting-fertility
effect. The increasing proportion of young unmarried mothers over the past
two decades and relatively high contraceptive prevalence rates among them,
account in large part for the comparatively low levels of fertility exhibited
by them. This changed reproductive behaviour is no doubt a major determinant
of the fertility decline in the country; a classic example of effective control
of fertility outside marriage.
Development and Fertility Change
The impact of economic development is manifested in various aspects of life.
Per capita GDP increased by seven times since independence, rising from 578
Pula in 1966 to 4,115 Pula in 1988/1989 (NDP7: 13). Per capita GNP nearly quadrupled
between 1980 and 1992, increasing from US $792 to US $2,790 at an annual growth
rate of 6.1 per cent (UNDP and World Bank 1989, World Bank 1994), the highest
in Africa besides Gabon.
Since the attainment of political independence, the government has been investing
millions of pula a year in providing infrastructural facilities such as roads,
electricity, water, telecommunications, sanitation, transport, education and
health. For example, in 1991, the proportion of females aged five years and
over who had "left school" increased from 22 per cent in 1971 to 35 and 41
per cent in 1981 and 1991 respectively. The proportion of females completing
secondary education increased form 8 per cent in 1971 to 23 per cent in 1991.
There have also been sharp increases in the labour force participation rates
over the past decade. The age specific activity rates increased during the
same period with the middle segment of the childbearing age range exhibiting
the highest rates: 54, 60, 56 and 53 per cent for the women aged 20-24, 25-29,
30-34 and 35-39 respectively - an age range where childbearing is at its apogee.
A sizeable proportion of women are still employed in the professional and
semi-professional and technical occupations. According to the 1991 census results,
40 and 66 per cent respectively of these occupational groups were women. The
socioeconomic development has been accompanied by shifts of women in occupational
groups with little motivation to groups with strong motivation for family limitation.
It is important to note that it is the shift in the occupational structure
and not the increase in income that motivates a reduction of fertility. Motivation
for family limitation is much stronger among working women than among the unemployed.
Opportunities for women to work either in family enterprise or outside the
home are likely to have contributed significantly to the fertility decline.
The dramatic increase in other infrastructure services such as access to potable
water, health facilities in the rural areas, tarred roads and telephones has
directly or indirectly made substantial contribution to the creation of conditions
for fertility decline in the country.
In addition to the provision of infrastructural facilities, the government
also adopted various measures that have facilitated the achievement of individual
demographic goals though it does not have an explicit population policy at
the moment. Botswana's family planning programme is rated as the strongest
in Africa and one of the strong programmes in developing countries, being ranked
eighth after China, Republic of Korea, Taiwan, Thailand, Sri Lanka, Indonesia
and Mexico (Ross et.al. 1992:80). The second half of the decade witnessed an
intensification of training of health and family planning personnel, development
of family planning guidelines and service standards and manuals for family
planning etc (see CSO 1984; 1988). It is therefore not surprising that significant
incipient decline in fertility began in the 1980s.
The MCH/FP programme made a substantial contribution to the fertility decline.
It assisted in facilitating the changes in the reproductive behaviour by engendering
a significant shift from traditional to modern methods. Proportion of all women
who ever used at least one modern method increased from 34 per cent in 1984
to 54 per cent in 1988; the corresponding figures for women in unions are 37
and 60 per cent. During the same period the proportion of women currently using
modern methods rose from 16 per cent to 29 per cent.
DISCUSSION AND CONCLUSION
It is quite evident from history that fertility decline is a matter of motivation.
The incipient fertility decline in Botswana, Zimbabwe and Kenya would not
have occurred without some fairly reasonable levels of economic infrastructure
stocks including that of health and education. The nature of the political,
economic and social changes that these two countries have undergone, especially
during the colonial period, played a major role in preparing the ground for
the decline in fertility. Profound changes in the traditional nuptiality patterns
and subsequent social and/or economic developments since the 1970s have been
the principal causes of fertility decline in the country. The expansion of
MCH/FP services was timely and the programme provided the highly motivated
female populace with the new technology.
Botswana's experience shows that a firm economic base that provides a sustainably
adequate standard of living for the people and a well organized family planning
programme can, to a large extent, cojointly narrow the gap between fertility
and mortality and establish a greater stability in population growth. But we
must not lose sight of the Asian experience which underscores the fact that
different mix of factors triggers off and sustains fertility decline in different
socioeconomic contexts ( Leete and Alam 1993). These experiences are worth
noting by policy-makers and government programmers.
Table 3:Mean Number of Children Ever Born By Age and Marital
Status:Botswana
Age Group
Total
Married
Livivg Together
Never Married
Divorced Separated
Widowed
12-14
-
0.04
0.09
-
0.08
0.09
15-19
0.18
0.58
0.68
0.15
0.62
0.41
20-24
1.12
1.70
1.48
0.95
1.89
2.00
25-29
2.27
2.78
2.50
1.89
3.02
4.12
30-34
3.49
3.93
3.67
2.90
3.72
4.65
35-39
4.60
5.10
4.72
3.76
4.62
5.25
40-44
5.56
6.09
5.64
4.45
5.26
5.99
45-49
6.05
6.61
6.01
4.87
5.55
6.26
50-54
6.28
6.88
6.17
4.98
5.82
6.35
55-59
6.35
7.01
6.00
4.88
5.60
6.45
60-64
6.11
6.77
5.17
4.62
5.54
6.19
65 +
5.36
6.19
5.08
3.60
4.09
5.46
Source ; 1991 Population and Housing Census , Administrative and Technical
Table 4 : Proportion NeverMarried, Children Ever Born(CEB)
and Proportion Childless, Women Aged15-19 and 20-24 Years : Botswana 1971-1991.
Never Married
CEB
Childless
Year
15-19
20-24
15-19
20-24
15-19
20-24
1971
87
56
0.1
1.0
77.1
28.8
1981
93
69
0.2
1.2
77.9
23.6
1988
94
70
0.3
1.2
76.5
25.4
1991
94
72
0.2
1.0
81.0
29.3
Sources:1971,1981,1991 censuses and 1988 BFHS 11
REFERENCES
Caldwell, J.C. et. al. (1992) "A new type of fertility transition in Africa" in Population
and Development Review,vol.18.no. 2,
C.S O. (1984,1988) Botswana Family Health Surveys 1 and 11 Gaborone,
1971,1981 and 1990 censuses
(1995) "Fertility Situation in Botswana",prepared by Dr.O.Adegboyega, forthcoming.
Cobbe, J. (1983) 'Emigration and development in Southern Africa, with special
reference to Lesotho. International Migration Review, 17,837-68.
Gulbrandsen, O. (1986) "To Marry or Not to Marry : Marital Strategies and
Sexual Relations in a Tswana Society". Ethnos 15(1- 2): 7-28.
Jolly ,C.L. and. Gribble, J.N (993) "The Proximate Determinants of Fertility" in Demographic
Change in sub-Sahara Africa by Foote, K.A et. al. (eds). National Research
Council, USA
Kuper, A. (1969) African Marriage in an Impinging World: The case of Southern
Africa ' in African Marriage and Social Change, edited by Lucy Mair.
Frank Cass and co.
Leete, R.& Alam,I. (1993) The Revolution in Asian Fertility: Dimensions,
causes and Implications Clarendon Press Oxford
Lesthaeghe, R.(1986) "On the Adaptation of sub-Sahara Systems of Reproduction " in The
State of Population Theory : Forward From Malthus. by Coleman,D. and
Schofield,R.{eds). Basil Blackwell.
Republic of Botswana (1991) National Development Plan 7, Ministry
of Finance and Development Planning
Ross, et. al. (1992) Family Planning and Child Survival Programs: As Assessed
in 1991, Population Council, New York.
Schapera, I. (1933) "Premarital Pregnancy and NativeOpinion: a note on
social change" Africa, 6,pp59-89
Schapera, I. (1971) Married Life in an African Tribe New York, Sheridan
House.
- (1947) Migrant Labour and Tribal Life, Oxford University
Press.
- (!966) ? Married Life in a South-African Tribe, Northwestern University
Press, London
Udjo, E.(1994) Levels and Trend in Fertility in Botswana, paper
presented at the Department of Demography seminar on "The Magnitude and socioeconomic
Determinants of Fertility Decline in Botswana" 2nd December.
UNDP & World Bank (1989) African Economic and Financial Data,
New York and Washington.
Copyright 1995 - Union for African Population Studies