Objective- The aim of this study was to determine the first possible time for pregnancy recognition and several features of developing embryo between days 8 to 44 of pregnancy. Design- Experimental study Animals- Six healthy registered Caspian mares Procedures- Daily ultrasound examinations were conducted from days 8 to 44 (ovulation = day 0) of pregnancy to monitor the conceptus in Caspian ...

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 exposure have this effect. AIMS To study retrospectively current workers in lead using industries (battery manufacture, smelting, etc), and in non-lead using control industries, in four European countries, with Time...

BACKGROUND Mothers of multiples are alleged to be more fecund than mothers of singletons. Some authors have suggested monitoring twinning rates for assessing temporal changes in a population's reproductive health. METHODS Using a nested case-control design, we estimated the odds of a multiple birth in relation to fecundity in the US Collaborative Perinatal Project inclusive of 8546 pregnant w...

STUDY QUESTION Is age of menarche (AOM) associated with subfecundity and/or infertility in adulthood? STUDY ANSWER A late onset of menarche was associated with a slightly increased risk of subfecundity and infertility. WHAT IS KNOWN ALREADY Abnormal age at onset of menarche is a risk factor for several diseases later in life, but the effect on infertility is unknown. STUDY DESIGN, SIZE AN...

OBJECTIVES Fertility problems are an increasing public health issue in industrialised countries. Exposure to exogenous agents with endocrine disrupting properties, such as some pesticides, are potential risk factors for subfertility. The aim of this study was to determine whether time-to-pregnancy (TTP) is prolonged in male greenhouse workers exposed to pesticides in comparison with a non-expos...

BACKGROUND Little is known about time trends in fecundity because few population-based data are available. In a survey among female twins born from 1953 to 1976, their time to pregnancy did not differ from singletons and can be considered to represent the fecundity of the general population. METHODS Information was collected by interview about waiting time to first pregnancy (TTP) and any per...

Introduction: Pregnancy, especially the first pregnancy and childbirth, affects the women’s quality of life. Improving information-seeking behavior facilitates the decision-making process of women during pregnancy and postpartum. The aim of this study was to investigate the health information-seeking behavior of Iranian first-time mothers and first-time pregnant women. Methods: This research...