Short menstrual cycle lengths and early or late onset of menstruation are associated with reduced fertility, according to a new study.
The findings in the journal Annals of Epidemiology are the latest from an ongoing internet-based study of more than 2,100 women trying to get pregnant. The new study used questionnaires to ascertain menstrual cycle characteristics and pregnancy status, in an effort to find links between the two. Some participants charted their menstrual cycles daily via an online program, Fertility Friend.
