Fertility preferences and contraceptive use in Pakistan.
Soomro, Ghulam Yasin ; Farooqui, M. Naseem Iqbal
INTRODUCTION
Pakistan, established in 1947, is currently experiencing one of the
highest growth rates of population in the world. If the 1972-81
intercensal growth rate continues, the population size would be
approximately 95 million in 1985 and 150 million by the year 2000. The
growing population size is already straining the scarce resources of the
country and will further aggravate the level of socio-economic
development; for the family planning programme which was launched to
check the pace of population growth has not produced any tangible
results. The major criterion for the successful implementation of a
programme is that there should exist an effective demand in the society
which should be matched equally with the supply. In Pakistan, the
reverse has been experienced so far. The programme has been very active
in maintaining an adequate supply of contraceptives without perceiving
the demand situation. For the desired achievement of a programme three
preconditions deduced from the demographic transition theory have been
set forth by Coale [3]. The demand aspect of these includes perceived
choice of an individual and favourable socio-economic conditions for
declined fertility. In order to facilitate transformation of the
perceived choice into behaviour, the availability of appropriate
contraceptive technology is essential.
During the last 20 years, three post-programme demographic surveys
were conducted in Pakistan at the national level to capture, among other
demographic indicators, the knowledge, attitude and practice levels.
These surveys revealed a prevalence rate of 5.5 percent in 1965, of 5.2
percent in 1975 and of 4.2 percent in 1979. It may be pointed out that
during this period (1965-79) the programme underwent several
well-conceived and logically consistent changes aimed at improving
availability and supply situation to enhance acceptance but they did not
produce any tangible results. The programme accepters have been women of
high age and parity, presumably under demographic pressure, indicating
that use has primarily been for limiting purposes. This implies that
fertility levels are at an earlier stage of demographic transition and
the programme is at the stage of recency. In these circumstances, it
becomes important to analyse the child-bearing attitude in the target
population of Pakistan. The attitudinal preferences measured through the
responses to questions about the levels of desired and ideal family size
are expressive and can be easily used for analysing the future shape of
fertility, process of fertility choices, understanding of wanted and
unwanted concepts and motivation for future contraceptive use. The
analysis of family size preferences provides an insight into the
consistency between reproductive attitudes and behaviour of couples
described in the temporal sequence of ideal, desired, intended, expected
and actual family size levels [6]. The decision on family size
preferences, it is argued, is not formal in nature but rather a response
to prevalent social pressures and serves as a fairly accurate predictor
to completed family size levels [2]. Ryder argues that couples choose a
reproductive target and are almost successful in hitting it depending
upon the reproductive norms they have internalized [5]. In the case of
Pakistan DeTray noted: "... it does confirm that desires for
specific number of children are important in influencing couples'
behaviour: in fact in Pakistan these demand factors appear to dominate
contraceptive choice decisions" [4]. However, reliability of these
attitudinal responses is often doubted in terms of its predictability
towards completed family size. Still, questions on desired and ideal
family-size levels have been widely asked in sample surveys conducted
the world over [8].
OBJECTIVE
The objective of this paper is, therefore, to analyse the levels
and trends of fertility preferences in Pakistan during the 1975-1980
period and to see if any changes in the preferences have occurred over
time even in the absence of the information, education and communication
(IE&C) component of the family planning programme. Our hypothesis is
that there exists a concious choice of reproductive goals among married
couples and there is no likelihood of any significant change in these
expressed choices over time for the last twenty years. A short gap in
communication would not produce any sizeable change in the already
in-built reproductive perceptions of the couples.
DATA AND THEIR LIMITATIONS
In this study, data from the Population, Labour Force and Migration
(PLM) survey have been utilized. This survey, sponsored by the UNFPA and
the ILO, was conducted by the Pakistan Institute of Development
Economics in 1979-80. In the PLM Survey, the fertility component
repeated the questionnaire of the Pakistan Fertility Survey (PFS)
without any modifications. A comparison of fertility preferences
obtained through the PLM (1979-80) survey have been made with those of
the PFS of 1975.
The question asked on ideal family size was, "In your opinion
how many children should a married couple have?" The question on
ideal family size was asked to know the generalized ideal family size
rather than the personal ideal. However, this type of information has
certain of limitations. The question on ideal family size may create
some conceptualization problems for a respondent. When a woman is asked
to express an abstract generalized ideal as was done in Pakistan,
chances are that she might have been confused it with her personal
attitude. Moreover, the component of sex preferences for children is not
included in the question and information gathered on ideal family size
does not explain whether the expressed number is for live births or for
surviving children. Another measure of preference, the desired family
size which is defined as the surviving children with additional number
of children wanted, has its own limitations. Ryder [5], while explaining
the problems involved in estimating the desired family size, pointed out
that "this does give us a number for every respondent, but the
outcome is a bastard mixture of hard and soft data with the proportion
of each depending on respondent's reproductive location". The
outcome of responses to questions on wanting and not wanting more
children has some inherent problems stemming from its conceptualization.
The women who expressed their desires either way posed the problem of
definition and accuracy of expressed attitudes as well as their actual
behaviour. The pregnant low-parity female respondents counted for the
next parity would normally desire more children, thereby making their
responses positive in a pronouncedly biased way.
RESULTS AND DISCUSSION
In order to evaluate the reliability of PLM data on fertility
preferences, a consistency check on the responses of wanting or not
wanting any more children with the number of surviving children was
performed. The consistency exercise revealed 86 percent consistent
responses from the PLM survey (Table 1). A similar test on PFS data
revealed up to 85 percent consistent responses. This exercise,
therefore, reveals that the quality of fertility preferences data of PLM
is equally comparable with that of corresponding PFS data.
The measure of family size preferences and actual fertility are
shown in Table 2 for all currently married women. The ideal number of
children is slightly higher in PLM than in PFS whereas the children ever
born are closely comparable for both the surveys.
The figures of fertility preferences show comparability of desired
number with ideal number of children. However, completed fertility
appeared to be higher than surviving fertility. The factor of infant and
child mortality probably influenced the family size combinations. It
appears that couples make rational decisions to achieve their ideal
family size and adjust their completed family size accordingly.
The potential fertility estimates were derived by application of
the Prevalence Model developed by Bongaarts (1) [1]. In order to arrive
at the measure of excessive or unwanted fertility, a difference between
potential and desired fertility was considered a measure of unwanted
fertility. The level of unwanted fertility appeared to be over two
children which stayed almost constant between 1975 and 1979-80. The
constancy of the measure is reflective of a weaker programme, unchanged
fertility levels and fertility preferences in Pakistan during the period
under study.
Table 3 shows attitudinal and behavioural performance of fertility
by age of women. The ideal family size is higher in the PLM survey and
slightly increases with women's age. The increasing trend in ideals
by age could also be observed in PFS but at slightly lower levels in
each age group compared with the PLM. The figures for children ever born
(CEB) at the terminal age group are higher than the ideal family size
levels. The discrepancy appeared to be of the magnitude of two children.
The obvious factor influencing the decisions was infant and child
mortality which could be observed by the gap between living and
ever-born children in each age group of women. When the parents achieve
four living children, almost equal to their ideal number, they, on the
average, prefer to have one more child. This is probably due to an
insurance effect against mortality or due to desired sex composition of
family size. The age differentials for family size preferences reveal
that younger women desire more children in anticipation of completing
their ideal number in the prevailing mortality and sex preference
atmosphere. However, when completed family size of older women is
analysed, it appears that it surpassed their ideal number. This probably
is the reason why generalized ideal number, if increasing with age, is
biasing it with the personal experiences.
Table 4 provides information on women who do not want any more
children. This is a very important indicator which reflects the
prevalent desire to limit the family size. In the PLM survey, 40 percent
women reported their desire to stop childbearing whereas 43 percent
reported similar attitudes in the PFS. This reflects that the number of
women who want more children has increased over time. This finding could
also be supported by responses of nearly 54 percent never-users some of
whom reported wanting children as a reason for non-use [7]. The younger
women expressed a lesser willingness for not having any more children.
The older women aged 30 and over expressed a greater desire for limiting
their family size. Similarly, women with four living children expressed
higher preferences for limiting their family size. These findings hold
for both the surveys. The results suggest that as women get older and
near higher parity, they desire not to have any more children. In
comparison with those in the PFS, the women in the PLM survey reported
lower preferences for not having children in all age groups and in
entire range of number of living children.
However, 62 percent women in the age group of 35-39, and 61 percent
with 4 living children in the PLM survey do not want more children. The
women with these characteristics appear to be the primary target for
family planning administration if they are not practising any form of
contraception. The women with higher education in both surveys expressed
desire to limit fertility. Women with primary-level education roughly
had the same attitudes towards fertility as illiterates, showing that
there was no impact of primary-level education.
Table 5 exhibits the sex composition of children in the historic
perspective of son preference in the family size by age of mother. It
appears that at least one surviving son in the family positively affects
the attitudes towards limiting the family size. Although preferences
expressed in the PLM survey are lower compared to those in the PFS still
these confirm the same pattern of increasing preferences for limiting
family size by age of mother with at least one living son in the family.
This provides insight into the favourable cultural and personal biases
of having at least one surviving son for the completed family size.
The desire to have more children is shown in Appendix Table 1 by
background characteristics of mothers. The desire to have more children
declines with advancement in age and the number of living children.
However, there appeared to be slightly higher fertility preferences in
the PLM survey, which is more pronounced among the younger mothers.
Table 6 shows contraceptive practices by background variables which
are related to the family size preferences. The overall contraceptive
levels appear to be 4 percent in the PLM survey compared with 6 percent
in the PFS. This shows a little decline in the use levels in Pakistan
[7]. The use levels, when studied by age, reveal an increase in use with
the progress in age in both PLM survey and the PFS. However, use levels
are lower in the former for all age groups than in the latter. Similar
patterns could be observed for the number of living children and sons.
The use levels in the PLM survey are almost non-existent at zero and
first parity and only equal the overall average when family size
consists of three living children. Similar results hold for the PFS. The
use levels in the PLM survey increase when two living sons are in the
family size. At the corresponding level, the use was almost twice as
great in the PFS. This shows an element of son preference in use
decisions, i.e. living sons are an integral part in the completed family
size. These use patterns suggest that high age and parity women practise contraception out of demographic pressure. Moreover, the use levels in
Pakistan are primarily for limiting the family size.
The women who do not want any more children presumably are those
who have completed their family size and were practising reasonably
higher levels of contraception than those who wanted children. The other
consistency measure of completed family size in line with ideals is a
comparison with living children. This shows that women whose living
children are more than ideal and who also want no more children were
practising higher contraception than those whose living children's
number equalled the ideal family size. However, use level among those
women who have not achieved ideal family size is virtually non-existent.
The effect of education on use levels is greater than that of arty other
bakground variable. In both the PLM survey and the PFS, use is very low
among the uneducated but increases with educational levels. This
reflects family size norms among the educated couples and their amount
of awareness of the need to limit family size. The urban-rural
differences in use show that use levels were higher in urban areas in
both the PLM survey and the PFS. However, use levels show a decline in
urban areas in the PLM survey against the levels revealed in PFS. The
use levels in rural areas also appeared to have declined in the PLM
survey.
This shows the contracepting tendency of women who do not want more
children or whose actual family size is greater than their ideal family
size. Moreover, these groups of women appeared to be consistent in their
expressed desires.
SUMMARY AND CONCLUSION
The analysis of data obtained for the two national surveys
indicates that the surveys in question are highly consistent with regard
to fertility preferences. They also indicate that the magnitude of
family size preferences did not change appreciably between the two
surveys. Moreover, the period and cumulative fertility behaviour in both
the surveys did not record any significant variation. The same hold for
the measure of unwanted fertility. However, there appears to be a slight
variation in fertility attitudes. In the PFS the ideal family size was
4.2 compared with 4.6 in the PLM survey. As regards the desire for more
children, 43 percent married women did not want to have any more
children in the PFS compared to 40 percent in the PLM survey. These
variations apparently show an increase in the fertility preferences.
However, when analysed carefully, they tend to show that the differences
are the result of the differential impact of survey methodology,
sampling variability and coverage. The sample size of the PLM survey was
twice that of PFS and in the former the proportion of low-parity females
was slightly higher as compared to that in the PFS. The percentage of
women whose living children were more than or equal to their desired
number of children was 33 percent in the PLM survey compared to 39
percent in the PFS. On the other hand, the women whose living children
were less than the desired children and also wanted more children were
52 percent in the PLM survey as against 46 percent in the PFS. The
examination of contraceptive use reveals that the prevalence level was
lower in the PLM survey. The PLM survey use rate was based on responses
given by women who had knowledge of at least one contraceptive method.
These were only 29 percent in the PLM survey as against 75 percent in
the PFS. Therefore, it seems a problem of concealment in the PLM survey
rather than an expression of facts. Had the same number of women been
asked question on contraceptive use in both the surveys, the results
might have been different. However, when contraceptive behaviour was
analysed with the reported fertility preferences, it appeared that the
women were quite consistent in their stated fertility attitudes.
On the basis of the results derived from this study and the PFS, a
substantial number of married women can be observed who do not want any
more children (43 percent in the PFS and 40 percent in the PLM survey).
These women appear to be suceptible clients of family planning
programme. It proves that demand for contraceptive services already
exists in a significant portion of married women. What is needed is an
effective exploitation of the existing demand through an efficient
supply of contraceptive services in terms of both their convenient
availability and accessibility.
Comments on "Fertility Preferences and Contraceptive Use in
Pakistan"
I have already made an oral presentation giving my comments on the
abovementioned paper presented in the session. However, written comments
based on recalled memory are as follows:-
The authors have to a great extent based their analysis on PLM
survey data relating to fertility preferences and contraceptive
use. Their analysis need not be questioned as the limitation of
quality of data relating to fertility module of the PLM survey has
been a controversial issue. The Population Welfare Programme
through government channels was established in 1960 and not in 1965
as mentioned by the authors.
The authors have also made a comparison based on data from PFS and
the PLM survey. It is a questionable matter whether the comparison
of two sets of data is feasible and meaningful. Generally,
comparisons yield confusing results owing to difference in the
operational methodology of data collection in two surveys, the
quality of training of interviewing staff and the contents of
training. No doubt the questionnaire as designed for PFS was
replicated in the PLM survey. This does not mean that the data
collected through this questionnaire in two different surveys will
be feasible for drawing some sort of comparison. There are several
other factors such as training of master trainers for imparting
training to field staff, training of supervisors and contents of
the training and quality of supervision which are needed to be
analysed for assessing the quality of data in both the surveys.
On the basis of my involvement in the PLM survey, I can say that
the training component was extremely poor as only one-day training
was given to the interviewers to undertake data collection on this
sophisticated questionnaire. Although among the 48 staff
interviewers, there were about 20 staff interviewers who had the
experience of collection of data in the PFS, the remaining staff
interviewers did not have any background of data collection from
the respondent.
No proper manuals for staff interviewers and supervisors were
developed adequately and the entire job was left to the contractor.
Questions like "ideal family size" and "contraceptive use" relate
to reproductive attitude and behaviour of couples, and it requires
a great skill to dig out information from the respondent on such
issues. If asked in a casual way without proper or skilled probing,
the respondent is also expected to answer in a casual way.
The deficiencies pointed out by other experts, relating to the
execution of the survey, have resulted in a wide range of
difference in the findings of the two surveys conducted in 1975 and
1979, e.g. the level of knowledge of contraceptives on the basis of
the PLM survey has declined from 75 percent in 1975 to 29 percent
in 1979. The debatable issue is how the level of knowledge of
contraceptives could so drastically decline when the cohort of
population over a 5-year period has not changed. Similarly, the
level of contraceptive practice on the basis of the PLM survey has
declined from 6 percent to 4 percent. When data on other surveys
like Impact Survey and Contraceptive Use Prevalence Survey (CUPS)
1977 are analysed, the findings of these surveys match the findings
of PFS to a great extent.
The methodological aspect of the paper is weak and analysis has
been based only on cross-tabs. The empirical analysis of fertility
preferences requires controlling of a battery of socio-economic and
demographic variables which simply cannot be studied by cross-tabs.
It would have been appropriate if the authors had studied this
aspect by applying multivariate analysis.
The analysis of ideal and desired family sizes, based on
cross-sectional surveys, may not lead to a conclusive finding.
Analysis of attitudinal aspects would have been stronger if it was
based on follow-up information which is unfortunately lacking in
Pakistan. It would, therefore, be difficult to draw inferences on
attitude-behaviour relationship for family formation and
contraceptive use in Pakistan.
It is, therefore, imperative that the comparison of two sets of
data be carefully undertaken with supportive information of quality of
data on both the sets which are taken for comparison purposes.
I would appreciate if the authors, who have done an excellent work
in presenting this paper, would also take serious note of the quality of
data.
Khalil A. Siddiqui
Director General, Monitoring and Statistics, Population Welfare
Division, Government of Pakistan, Islamabad
Appendix Table 1
Appendix
Mean Number of Additional Children wanted by Currently Married Women
(CMWs), by Age and Number of Living Children, Pakistan PFS 1975 and
PLM Survey 1979-80
PFS PLMS
By Age of CMWs
<20 3.1 3.6
20-24 2.1 2.7
25-29 1.3 1.8
30-34 0.7 1.1
35-39 0.4 0.6
40-44 0.2 0.4
45-49 0.1 0.1
All 1.2 1.4
By Number of CMWs Living Children
0 3.6 4.0
1 2.4 3.0
2 1.3 1.9
3 0.9 1.2
4 0.5 0.5
5 0.4 0.3
6 0.2 0.2
7+ 0.1 0.1
All 1.2 1.4
Sources: (a) Population, Labour Force and Migration (PLM) Survey
Fertility Module, 1979-80.
(b) Pakistan Fertility Survey (PFS) First Report, 1976.
REFERENCES
[1.] Bongaarts, John. "A Prevalence Model for Evaluating the
Fertility Effect on Family Planning Programmes". Paper Presented at
Third Expert Group Meeting on Methods of Measuring the Impact of Family
Planning Programmes on Fertility, Geneva, April 19-23, 1982.
[2.] Bumpass, Lary L., and Charles F. Westoff. Later Years of
Childbearing. Princeton, New Jersey: Princeton University Press. 1971.
[3.] Coale, Ansley J. "Demographic Transition".
International Population Conference. Vol. 1. Liege, 1973. Liege: IUSSP.
1974.
[4.] DeTray, Dennis N. "The Demand for Children in a Natural
Fertility Population". Pakistan Development Review. Vol. XVIII, No.
1. Spring 1979.
[5.] Ryder, Norman. "A Critique of National Fertility
Study". Demography. Vol. 10, No. 4. 1973.
[6.] Ryder, Norman, and Charles F. Westoff. "Relationship
among Intended, Expected, Desired and Ideal Family Size: United States,
1965". Population Research. Vol. 1, No. 7. 1969.
[7.] Soomro, G.Y, and S.M. Ali. "Prevalence of Knowledge and
Use of Contraception in Pakistan". Islamabad: Pakistan Institute of
Development Economics. 1984. (Population, Labour Force and Migration
Survey Project Report, No. 3)
[8.] Ware, Helen. Ideal Family Size. London: World Fertility
Survey. 1974. (Occasional Paper, No. 13)
(1) Potential fertility estimates were arrived at the following
formula:-- PAF = AF (1-Cxu")/(1-CX(u'+u"))
Where:
PAF = Potential Age specific fertility rate
AF = Age specific fertility rate C(a) = Elasticity Coefficients by
age u' = Prevelance of programme contraception by age u" =
Prevalence of non-programme contraception.
Ghulam Yasin Soomro and M. Naseem Iqbal Farooqui *
* Research Demographers, Pakistan Institute of Development
Economies (PIDE), Islamabad.
Table 1
Consistency Check on Responses of Currently Married Women According
to their Desired versus Living Number of Children,
Pakistan: PFS 1975 and PLM Survey 1979-80
Desired versus Living Children PFS 1975 PLMS 1979-80
Consistent Responses
1. Desired [greater than or equal to]
Living, Want No More 39.0 33.4
2. Desired > Living, Want More 46.0 52.4
Total Consistent Responses 85.0 85.8
Inconsistent Responses
1. Desired [greater than or equal to]
Living, Want No More 6 4.1
2. Desired > Living, Want No More 9 10.1
Total Inconsistent 15 14.2
Note: PFS = Pakistan Fertility Survey (conducted by the
Population Planning of Pakistan)
PLMS = Population, Labour Force and Migration Survey
(conducted by the Pakistan Institute of Development Economics)
Table 2
Mean Number of Ideal, Ever Born, Living, Desired
and Unwanted Children among All Currently Married
Women in Pakistan: PFS 1975 and PLM Survey 1979-80
Ideal No. No. of Total No. of
of Children Fertility Living
Children Ever Born Rate Children
PFS PLM PFS PLM PFS PLM PFS PLM
4.2 4.6 6.9 6.9 6.3 6.5 5.1 5.1
No. of
Desired Potential Unwanted
Children Fertility Fertility
PFS PLM PFS PLM PFS PLM
4.4 4.5 6.9 7.0 2.5 2.6
Table 3
Mean Number of Children Ever Born, Living, Wanted
Additional Children and Ideal Family Size by Age
for All Currently Married Women in Pakistan: PFS
1975 and PLM Survey 1979-80
Ideal Family No. of Children
Size Ever Born
Age PFS PLMS PFS PLMS
15-19 4.1 4.3 0.6 0.4
20-24 4.0 4.3 1.9 1.5
25-29 4.2 4.6 3.4 3.0
30-34 4.2 4.7 5.0 4.5
35-39 4.3 4.8 6.0 5.6
40-44 4.4 4.8 7.0 6.2
45-49 4.4 5.1 6.9 6.9
No. of Living Desired Family
Children Size
Age PFS PLMS PFS PLMS
15-19 0.5 0.4 3.6 4.0
20-24 1.5 1.3 3.6 4.0
25-29 2.8 2.5 4.1 4.3
30-34 4.0 3.8 4.7 4.9
35-39 4.9 4.6 5.3 5.2
40-44 5.2 5.0 5.4 5.4
45-49 5.1 5.4 5.2 5.6
Sources: (a) Population, Labour Force and Migration (PLM) Survey
Fertility Module, 1979-80. (b) Pakistan Fertility Survey (PFS)
First Report, 1976.
Table 4
Percentage Distribution of Currently Married, Fecund and
Pregnant Women who do not Want More Children by Age and
Number of Living Children, Pakistan: PFS 1975 and PLM
Survey 1979-80
Age PFS PLMS
By Age
Total 43 40
15-19 4 2
20-24 18 9
25-29 39 27
30-34 61 49
35-39 74 64
40-44 84 75
45-50 93 79
By Number of Living Children
0 2 0
1 7 4
2 30 16
3 48 35
4 69 61
5 78 73
6 90 81
7+ 94 88
By Education
No School 47 36
Primary 46 37
Secondary + Higher 51 40
Sources: (a) Population, Labour Force and Migration (PLM)
Survey Fertility Module, 1979-80.
(b) Pakistan Fertility Survey (PFS) First Report, 1976.
Table 5
Percentage Age Distribution of Currently Married
Non-pregnant Women who Wanted no More Children by
Number of Living Children and Sons: Pakistan PFS 1975
and PLM Survey 1979-80
No. of Living Children
One
Age No. of living sons
Zero One
PFS PLMS PFS PLMS
Less than 25 0 1 5 3
25-35 2 2 14 4
35-44 14 5 21 27
45+ 56 27 88 64
All 4 2 11 8
No. of Living Children
Two
Age No. of living sons
Zero One
PFS PLMS PFS PLMS
Less than 25 5 1 26 26
25-35 1 5 28 19
35-44 41 21 63 52
45+ 100 55 85 71
All 12 10 35 25
Sources: (a) PLM Survey Fertility Module 1979-80.
(b) Pakistan Fertility Survey (PFS) First Report 1976.
Table 6
Percentage Distribution of Women Currently using Contraceptives
by Background Variables, PFS 1975 and PLM Survey 1979-80
PFS PLM
By Age
<25 2 1
25-34 8 3
35+ 9 3
By Number of Living Children
0 0 0
1 1 1
2 4 2
3 6 3
4 7 4
5+ 12 4
By Number of Living Sons
0 1 1
1 5 2
2 8 4
3+ 11 6
Wanted more Children
No 7 5
Yes 1 1
Ideal vs. Living
Ideal < Living 12 10
Ideal = Living 6 6
Ideal > Living 1 1
Ideal vs. Living/Wanted
Ideal [less than or equal to]
Living, want no more 10 8
Ideal [greater than or equal to]
Living, want no more 5 3
Ideal [less than or equal to]
Living, want no more 3 2
Ideal [greater than or equal to]
Living, want more 1 1
Wife's Education
None 5 2
Primary 12 4
Secondary 27 13
Type of Residence
Urban 15 6
Rural 3 1
All 6 4
Sources: (a) Population, Labour Force and Migration
(PLM) Survey Fertility Module, 1979-80.
(b) Pakistan Fertility Survey (PFS) First Report, 1976.