Measuring time to pregnancy. Methodological issues to consider.
Olsen
J
J
Danish Epidemiology Science Centre, Aarhus, Copenhagen.
Juul
S
S
Basso
O
O
D003267:Contraception; D005260:Female; D005298:Fertility; D006801:Humans; D008297:Male; D008597:Menstrual Cycle; D011247:Pregnancy; D012099:Reproductive Techniques; D013997:Time Factors