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Results for “Open Live-birth Intervals”

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PubMedDate not supplied

Childlessness, subfertility, and infertility in Tanzania.

This study examines the trends and variations in childlessness, subfertility, and infertility in Tanzania according to data from the 1973 National Demographic Survey and the 1991-92 Demographic and Health Survey. Between the surveys, the proportion of women older than 30 who were childless was found to have declined more than 60 percent, and the proportion with an open birth interval extending for longer than five years was reduced by 40 to 50 percent in each standard five-year age group from 20 to 39. Within Tanzania, both childlessness and infertility are higher among urban than rural residents, and a substantial range prevails across eight rural zones. Finally, evidence suggests that the decline in impaired fertility has been followed by an increase in the total fertility rate. The difficulties of implementing population policies that aim simultaneously to control population growth and to improve women's health are discussed.

Adolescent↗
PubMed1984

Estimation of fertility in Indonesia 1980 from last live birth data.

A method of estimating current fertility from information on last live births is presented. The technique is developed from one proposed by Hull for estimating fertility rates for Indonesia using 1976 intercensal survey data and does not depend on conditions of stable fertility or on assumptions about past mortality. "The estimates of [the] total fertility rate for Indonesia 1980 are 4.40, 3.87 and 4.28 for the rural, urban and the total areas respectively, and compare well with the estimates derived by the 'Own Children' method." A comment by Aris Ananta (pp. 49-53) is included. (summary in IND)

Asia↗
PubMed1988

Has Thailand's fertility decline stalled?

Thailand is 1 of the third world countries in which a very substantial fertility decline has occurred during the last 2 decades. However, there has been some recent concern, based on fertility rates derived from 3 national contraceptive prevalence surveys conducted in 1978/1979, 1981, and 1984, that the fertility decline may have lost momentum at a level well above replacement fertility. New evidence now available from a more recent national survey which permits calculation of retrospective fertility trends, in combination with those from registration data, clearly contradicts the suggestion of a fall in the fertility decline. Moreover, because expected family size remains low among women currently starting their reproductive careers and evidence shows that the preferred number of children has fallen more or less steadily, low fertility may be expected to be a feature of the Thai population for some time to come.

Asia↗
PubMedDate not supplied

On a probability model of open birth interval.

"Many authors [have] pointed out that analysis of open birth interval (the period elapsed from the last live birth till the date of the survey) could be of great interest to study the process of human reproduction, because it directly exhibits changes in fertility due to recent use of contraception or incidence of secondary sterility. Moreover, open birth intervals may be chosen to study the linkage between fertility and migration. A probability model for describing variations in the length of open birth intervals has been applied separately to couples with both spouses present at home, and to couples with one spouse having migrated away. The model has then been applied to [survey data for India] to get an estimate of the risk of conception and of secondary sterility." (SUMMARY IN ITA AND FRE)

Asia↗
PubMed1986

On a probability distribution to study the open birth interval and its application.

"A probability distribution for describing the variation in the length of open birth interval regardless of parity has been derived assuming that fecundability varies from female to female and the births are of two types, one which results [in] infant death and the other [which does] not. To get the estimates of the parameters, expressions for the first two moments have been derived. The model has been applied to the data taken from the survey 'Rural Development and Population Growth--A Sample Survey 1978,' conducted under the auspices of the Demographic Research Centre, Banaras Hindu University [India]."

Asia↗