Rotating shift work may affect menstrual cycle

Women who work rotating shifts may be somewhat more likely to experience shifting menstrual cycles according to a new study that raises the possibility of work schedules affecting fertility.
Irregular, for the purposes of the study, meant that the time between a woman's periods usually varied by more than a week. Menstrual irregularities make it harder for a woman to become pregnant.
Women who work nights are advised to pay close attention to their diet and exercise habits — both of which can be challenging for people on irregular work schedules.