Title: Trends in fecundability and sterility according to age of the female.

POPLINE Document Number: 201522

Author(s):

Yadava RC
Barman D
Singh KK

Source citation:

In: Proceedings of Seminar on Recent Development in the Techniques of Population Analysis and Statistical Inference, edited by S.N. Singh. Varanasi, India, Banaras Hindu University, Centre of Population Studies, [1982]. :86-94.

Abstract:

This paper examines trends in fecundability and sterility by female age at 2 points in time. The estimates of fecundability and sterility are obtained using the model of Singh et al (1962), which gives simple procedures for estimating these parameters. Data come from 2 demographic surveys of rural Varanasi, India, in 1969 and 1978. Some interesting results can be estimated relating to the trend in fecundability over the 2 periods. The estimate of fecundability for the age group 20-25 in 1969 is considerably lower than that obtained in 1978. The age groups 25-30 have similar fecundability rates for both periods, but for the rest of the age groups the 1978 rates are lower than those for 1969. The lower values of fecundability in later age groups for 1978 may be due to the increasing use of non-terminal family planning methods to limit family size. Women do not develop full reproductive maturity for several years after the 1st menstruation. The high incidence of sterility after age 35 may be due to sexual abstinence or perhaps to the poor health of women.

Keywords:

India
Fecundability
Fecundity
Fertility
Infertility
Urogenital Effects
Diseases
Mathematical Model
Models, Theoretical
Research Methodology
Maternal Age
Parental Age
Age Factors
Rural Population
Population Characteristics
Population
Changes
Asia, Southern
Asia
Developing Countries
Reproduction
Population Dynamics
Demographic Factors
Urogenital System
Physiology
Biology
Social Change