PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Birth Intervals--determinants”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

15 recordsLinked to original sources
PubMed1989

Seasonality of births and family characteristics in a Spanish population.

The seasonality of births in the period 1871-1977 is studied in a rural north-western Spanish population. Based on a total sample of 11,695 birth registrations, temporal variation is analysed. For siblings, according to family reconstitution, the total family size, the legitimacy of the child, and birth order are considered. A coefficient of birth month dispersion is defined and estimated for each family. Intra-family variation is related to inter-family coefficients in order to determine whether the local seasonal pattern of births may be partly explained by family characteristics.

Birth Order↗
PubMed1995

Birth intervals regarding infant mortality and extramarital reproduction in a Spanish rural community.

Record linking provided information on the complete reproductive schedules of a sample of 1102 couples with at least two children born alive from a rural Spanish community characterised by very high extramarital reproduction. Birth spacing was analysed considering final family size as well as the legitimate-illegitimate status and sex of the newborn, and survival of the preceding sibling.

Birth Intervals↗
PubMed1997

Birth interval and the sex of children in a traditional African population: an evolutionary analysis.

Birth interval is a major determinant of rates of fertility, and is also a measure of parental investment in a child. In this paper the length of the birth interval in a traditional African population is analysed by sex of children. Birth intervals after the birth of a boy were significantly longer than after the birth of a girl, indicating higher parental investment in boys. However, in women of high parity, this differential disappeared. Birth intervals for women with no son were shorter than for those with at least one son. All these results are compatible with an evolutionary analysis of reproductive decision-making. First born sons have particularly high reproductive success, daughters have average reproductive success and late born sons have low reproductive success. The birth interval follows a similar trend, suggesting that longer birth intervals represent higher maternal investment in children of high reproductive potential.

Adult↗
PubMed1999

Effects of the status of women on the first-birth interval in Indian urban society.

The status of women, which is relative and multidimensional, has an important bearing on any long-term reduction in fertility. In Indian society, where cohabitation and childbearing are socially sanctioned only after marriage, the length of the first-birth interval affects the completed family size by influencing the spacing and childbearing pattern of a family. This study examines the influence of certain aspects of the status of married women--education, employment, role in family decision making, and age at marriage--along with three socioeconomic variables--per capita income of the family, social position of the household, and the caste system--on the duration of the first-birth interval in an urban Hindu society of the north-east Indian state of Assam. The data were analysed by applying life table and hazard regression techniques. The results indicate that a female's age at marriage, education, current age, role in decision making, and the per capita income of the household are the main covariates that strongly influence the length of the first-birth interval of Hindu females of urban Assam. Of all the covariates studied, a female's education appears to be a key mediating factor, through its influence on her probability of employment outside the home and thereby an earned income and on her role in family decision making. Unlike other Indian communities, the effect of the caste system does not have a significant effect on first-birth timing in this urban Hindu society.

Adolescent↗
PubMedDate not supplied

Educational expansion and changes in entry into marriage and motherhood. The experience of Italian women.

"The purpose of this paper has been to assess empirically the question of whether women's growing economic independence, resulting from better education, is one of the major factors in determining the timing of marriage and motherhood in Italy.... We have analysed the life histories of a sample of Italian women from different cohorts, collected on the occasion of the National Survey on Family Structures and Behaviours carried on by the National Institute of Statistics.... The effect of level of education is negative. That is, it increases the age of entry into marriage. However, the size of the effect is small and seems limited to the passage from youth to adulthood, because the longer time the woman spends in the educational system increases the age at which she feels herself ready to marry. As far as the timing of the first child, it is almost independent of educational attainment, once marital status is taken into account." (SUMMARY IN FRE AND ITA)

Birth Intervals↗
PubMedDate not supplied

Determinants of birth intervals in Kerala: an application of Cox's hazard model.

"The present study is an attempt to delineate the differences in the patterns and determinants of birth intervals which appear highly relevant in a transitional population such as Kerala [India]. In this country two comparable surveys, with a period difference of 20 years, were conducted. The study tries to estimate the effects of socio-economic, demographic and proximate variables using Cox's proportional hazard model. For the former data-set, socio-economic variables have [a] significant effect on birth intervals, while for the latter data proximate variables are the significant determinants of birth intervals." (SUMMARY IN ITA AND FRE)

Asia↗
PubMedDate not supplied

The fertility impact of spousal separation.

The impact of spousal separation on marital fertility in a natural fertility context is investigated. REPMOD, a procedure for computer simulation of reproductive processes, is employed. A given length of separation affects fertility more, the less it overlaps with time during which the woman is not at risk of conception. Thus the "efficiency" of separation as a constraint on fertility increases as its duration increases, the duration of postpartum amenorrhea decreases, and fecundability decreases. Effects of spousal separation in actual situations can be estimated using results of these simulations as inputs.

Birth Intervals↗
PubMed1976

Effect of adjustment for sex composition in the measurement of fertility on intrinsic rates.

The inconsistencies inherent in the one-sex models created a need for the construction of what are known as marriage functions, especially for the measurement of fertility. But attempts to develop marriage functions have been frustrated by the inability of the proposed functions to meet certain consistency conditions and also by difficulties in empiracally determining function parameters. Among several functions proposed so far, Das Gupta's (1972) "effective population" deserves special mention. He uses both sexes in its formulation, and has shown that the constancy of fertility rates based on such a function together with the constancy of survivorship probabilities of both sexes would result in a stable population. It is suggested in this article that the major source of the problem in a two-sex model seems to be the requirement that the model has to be specific both for sex and age. The ideal of incorporating the relative composition of one sex in the age-specific rates of the other, thereby creating a function dependent on both sexes, is advanced in this article. Such functions, defined explicitly for births, can be easily translated into age-specific birth rates. In addition to simplicity in the definition and form, the conditions leading toward stability can also be established. Interestingly enough, the intrinsic rate for this two-sex model lies in the interval determined by the rates obtained from the two one-sex models.

Birth Rate↗
PubMed1999

Determinants of protogenetic interval in a west Mediterranean rural population: La Alpujarra (southeast Spain).

This paper analyzes the protogenetic interval determinants and the influence on family size. The data came from La Alpujarra (Southeast Spain), consisting on a sample of 847 families marrying through-out the first half of the present century. The marital fertility includes 85% deliveries, 5% premarital births and the remaining 10% premarital conceptions. The protogenetic interval was clearly associated with the reproductive success since family size was nearly one child greater for short intervals (= < 16 months). The protogenetic interval largely depends on the occurrence of miscarriages preceding the first liveborn delivery as well as on maternal age. Consanguineous couples show slightly shorter intervals. A temporal decrease of protogenetic intervals was observed.

Birth Intervals↗
PubMed1993

Pregnancy intervals: their determinants and foetal outcome at the KCMC, Moshi, Tanzania.

A total of 566 multigravidae who delivered at the Kilimanjaro Christian Medical Centre (KCMC), Moshi, between 15th May and 30th July, 1989, were interviewed to determine the pregnancy intervals, their determinants as well as foetal outcome. 62.1% of the study group had pregnancy intervals longer than 2 years. The factors which appeared to influence pregnancy interval in this study included maternal age, period of breastfeeding, postpartum amenorrhoea, postpartum coital abstinence, contraception and outcome of the preceding pregnancy. Other factors such as maternal education, occupation, marital status, pregnancy order, and religion, did not appear to have any effect on the pregnancy intervals. The pregnancy interval did not seem to affect the outcome of the index pregnancy. It is recommended that those factors with a positive impact on pregnancy interval be promoted as widely as possible in Tanzania, so as to contribute toward the control of population growth, as well as the overall maternal and child health, and national economy.

Adolescent↗