Variation in couple fecundity and time to pregnancy, an essential concept in human reproduction.
te Velde
E R
ER
Department of Fertility and Endocrinology, University Medical Center Utrecht, The Netherlands.
Eijkemans
R
R
Habbema
H D
HD
D001723:Birth Rate; D005260:Female; D005298:Fertility; D005306:Fertilization; D006801:Humans; D008297:Male; D011247:Pregnancy; D013997:Time Factors