A representative sample of over one thousand couples who married during 1979 in England and Wales was followed from the date of marriage until mid-1984 to investigate the characteristics of couples who divorce soon after marriage.

Couples who apparently lived together before marriage had a below average chance of early divorce, whereas couples where the addresses of the partners before marriage were very close had a significantly high rate of early breakdown. The chance of early divorce was significantly above average for spouses marrying in their teens and for both husbands and wives who, at their marriage, belonged to social class V. Couples who married with a civil ceremony had an above average (and those marrying with a religious ceremony a below average) risk of early divorce, but such differences were found to be negligible on analysing the results from a matched case-control study in which each ‘case’ marriage (one which ended in early divorce) was matched with a ‘control’ marriage (one which did not end in early divorce). Age at marriage, marital status before marriage and the social class of both partners, the factors controlled for in the case-control study, are likely to be amongst the strongest predictors of early divorce.

The influence of household type on reproductive behaviour is examined for a national probability sample of Taiwanese women. In spite of remarkable social and economic development over the past three decades, extended families are still widely found in Taiwan. Women in extended households have only slightly higher fertility preferences and current fertility than women in nuclear families once marital duration is controlled. Although women in extended households marry earlier and receive more family help with child care than women in nuclear households, such factors are no longer sufficient to produce major differentials in reproductive behaviour. The findings suggest that preferences for smaller families and low fertility need not await a transformation to a nuclear family structure.

Sex ratio at birth was studied in relation to grandparental age, to enquire into the effect of the accumulation of X-linked recessive lethal mutations. From the data of the tenth census of the Italian population two samples of women having a live-born only child were examined: the first from some provinces of northern and central Italy, the second from the island of Sardinia.

Besides maternal grandfather's and grandmother's ages, the mother's age and some socioeconomic factors such as the woman's educational level, her urbanization index and time were included in a multiple regression analysis model. In both areas the results show a significant decrease of the sex ratio as grandpaternal age increases, a weaker effect of grandmaternal age, and a strong decrease when maternal age increases; this last effect is probably due to physiological factors, in addition to the genetic ones.

Differences between the partial regression coefficients of the two areas, though not significant, reflect the different socioeconomic and cultural conditions, which affect the sex ratio. From the partial regression coefficients on the grandpaternal age an estimate of the mutation rate was obtained.

An attempt was made to follow to completion the pregnancies of 2049 women who had amniocentesis for genetic purposes in a single hospital region in northern England. The object of the study was to establish the extent to which complications of pregnancy and fetal problems are attributable to the procedure. Follow-up was complete in 1750 women. Risks to the mother, other than minor abdominal discomfort following the amniocentesis, were minimal. The increase in complications to the pregnancy and delivery, the occurrence of congenital anomalies, spontaneous abortion, and perinatal death, that can be attributed to the procedure of anmiocentesis fall at the lower end of the range previously reported.

This study was carried out in four adjacent villages in Lower Egypt with a combined population of 24,000. A team of social workers and physicians worked together to introduce the injectable contraceptive depomedroxyprogesterone acetate as a post-partum long-acting contraceptive to the community leaders and the villagers at several meetings. Postpartum women who agreed to use the drug were defined as acceptors (591) and those who did not were defined as rejectors (715). The incidence of polygamy was higher among the rejectors, and rejectors' husbands had more children from their other wives. Acceptors had more previous pregnancies and children of both sexes than rejectors. The interval between the last two pregnancies was shorter among the rejectors. A greater percentage of acceptors had previously used another contraceptive. The commonest reasons for rejection were desire for further pregnancy (69%), health problems (11%) and desire for another method of contraception (8%). Religious factors figured in only 3% of cases.

In January 1985, a Gallup poll sponsored by the American College of Obstetrics and Gynecologists reported that 76% of the US women sampled thought that there were substantial risks with using the pill, 31% thought the pill caused cancer and 64% thought the risk of childbearing was equal to or less than that in taking the pill. To assess the perceptions of the pill's safety internationally, a survey of 100–150 urban, middle-class women aged 18–45 years was conducted in each of eight countries in the developing world. There were striking similarities in perceptions of the pill's health effects between countries: (1) taking the pill is considered to have substantial health risks by 50–75% and is thought to be more hazardous than childbearing by over 40% of respondents except those in the African samples; (2) women who had used the pill are as unaware as those who had not of possible serious cardiovascular adverse effects; (3) the protective effects of the pill are virtually unknown; (4) the greatest inconsistency with scientific evidence concerns the risks of sterility and birth defects attributed to pill use. With information from this survey, family planning programmes can rectify almost universal misperceptions of the pill's safety when counselling new and continuing pill users.

This paper examines the level and trend of fertility in Huaibei Plain, Anhui province, China, since 1950 and considers some determinants of fertility decline. The data used are from the 1/1000 survey of China which was conducted by the Family Planning Commission in 1982.

Fertility decline among younger women (aged under 30) is largely due to later age at marriage, the marriage pattern of Huaibei Plain having changed from early and universal marriage to later and universal marriage. Current use of contraception suggests that the family planning programme, in particular the one-child policy (1979), has been the major determinant in fertility decline. The greatest decline in marital fertility occurred among women aged 35+ and is primarily due to contraceptive practice and induced abortion.

The effects of marriage, contraception and post-partum lactational infecundability on fertility in Bangladesh are assessed by applying Bongaarts' formula to survey data for the period 1975–85.

Marriage is universal and age at marriage is low. Breast-feeding is prolonged and has a pronounced effect on fertility. The fertility-reducing effect of contraception increased over the period through increased use of modern methods. The TFR declined by 24% from 1975 to 1985.

Bongaarts' aggregate model of the proximate determinants of fertility is applied to data from the 1976 National Fertility Survey in Nepal. Breast-feeding is shown to be the most important limiting factor, resulting in a reduction of about six children per woman. Decline in the duration of breast-feeding by one-fourth would increase fertility by one additional child per woman. The temporary separation of spouses due to migration is conjectured to be the second most important fertility inhibiting factor, not explicitly accounted for in the standard model. Results are presented for the three major ecological regions, urban-rural residence and educational attainment of the women.

This paper, based on 1973–74 Growth of Alberta Family Study data, examines the sex preference for children among women in Edmonton. Discriminant functions are used to examine whether the two groups of women—those who prefer to have sons and those who prefer to have daughters—differ in selected characteristics such as age, birth place, residence in youth, education, religion, number and sex of siblings, traditional female roles, and attitude towards sex predetermination.

The results show some preference for sons, although generally women prefer to have children of both sexes. The variables birth place, number of female siblings of wife, and education of husband are found to discriminate best among the two groups. In general, the results suggest that sex preference among women is more heavily determined by their country of birth and number of male and female siblings. There is some evidence to suggest that preference for sex of children varies between adolescents and older women. The findings suggest that women generally do not favour the idea of sex predetermination.