Background: Glycol ethers are present in a wide range of occupational and domestic
products. Animal studies have suggested that some of them may affect ovarian function …

BACKGROUND A recent study suggested a markedly increased risk of hepatoblastoma
(HB) among children conceived with treatment for infertility. However, it is not clear whether …

Most research on reduced human fecundity has been on treatment of effects, while research
on determinants has been sparse. Increasing costs of infertility treatment, the event with 1, 2 …

Background: Despite the widespread use of retrospectively reported time to pregnancy to
evaluate fertility either as an outcome or as a risk factor for chronic disease, only two small …

Background Epidemiologic studies of fecundability often use retrospectively measured time‐
to‐pregnancy (TTP), thereby introducing potential for recall error. Little is known about how …

Many studies have found decreased fecundability, that is, the ability to conceive in a
menstrual cycle, with increasing female age. To evaluate the effect of maternal age on …

BACKGROUND It is plausible that a couple's ability to achieve the desired number of
children is limited by biological fertility, especially if childbearing is postponed. Family size …

Background: Lead exposure is known to be harmful to the male reproductive system,
including impairment of fertility. However, it is unclear whether currently existing low levels of …

Objectives: Fertility problems are an increasing public health issue in industrialised
countries. Exposure to exogenous agents with endocrine disrupting properties, such as …

Objective To investigate the relative contribution of genetic and environmental components
to subfertility. Design Twin design using a quantitative genetic liability threshold model that …