Of 17 032 women taking part in the Oxford Family Planning Association contraceptive study, 4104 stopped using a birth control method to plan a pregnancy on a total of 6199 occasions. The influence of various factors on fertility in these women was assessed by measuring the time taken to give birth to a child. An appreciable inverse relation was observed between age at stopping contraception and...

BACKGROUND The endometriosis fertility index (EFI) has a predictive value for pregnancy after surgery. In vitro fertilization and embryo transfer (IVF-ET) is a good treatment to infertility. This study aimed to provide external validation of EFI, assess the factors affecting the ability of EFI to predict cumulative spontaneous pregnancy rates (PRs), and propose reasonable advice for treatment b...

Background China has experienced an obvious fertility drop since the 1990s. Researches showed that social-economic growth played a more significant role than birth control policy in the process (Chen, 2005; Li, 2004). Analysis by Cai (2008) found that economic indicators are significantly related to total fertility rates in counties of Jiangsu and Zhejiang. However, there is a lack of analysis ...

This study examines the effect of household wealth on marital fertility in Sri Lanka. Data on type of dwelling, availability of vehicles, and electrical equipment in households were combined with estimates of 'typical' rupee values of various elements to generate an index of their wealth. Differentials in value of the wealth indices among sociodemographic subgroups of population are also descri...

The fertility potential of an artificial insemination (AI) dose is a function of the quantity, quality and health status of the semen contained therein. Therefore, identification of additional semen quality attributes associated with fertility could provide more accurate methods to predict, manage and select for AI sire fertility of predicting a bull's fertility rat. The objective of this study...

BACKGROUND Obesity is rapidly becoming a worldwide epidemic that affects children and adults. Some studies have shown a relationship between obesity and infertility, but until now it remains controversial. Thus, the aim of the present study was to investigate the effect of high-fat diet-induced obesity on male reproductive parameters. METHODS In a first experiment, male Wistar rats were fed a...

Exercise improves health but few data are available regarding benefits of exercise in offspring exposed to developmental programming. There is currently a worldwide epidemic of obesity. Obesity in pregnant women predisposes offspring to obesity. Maternal obesity has well documented effects on offspring reproduction. Few studies address ability of offspring exercise to reduce adverse outcomes. W...

Milk yield per cow has more than doubled in the previous 40 years and many cows now produce more than 20,000 kg of milk per lactation. The increase in production should be viewed with concern because: i) the increase in milk yield has been accompanied by declining fertility, increasing leg and metabolic problems and declining longevity; ii) there are unfavourable genetic correlations between mi...