Dunson, D.B.; Baird, D.D.; Wilcox, A.J.; Weinberg, C.R. (1999). «Day-specific probabilities of clinical pregnancy based on two studies with imperfect measures of ovulation». Human Reproduction14 (7): 1835-1839. ISSN1460-2350. PMID10402400. doi:10.1093/humrep/14.7.1835.
Dunson, D.B.; Baird, D.D.; Wilcox, A.J.; Weinberg, C.R. (1999). «Day-specific probabilities of clinical pregnancy based on two studies with imperfect measures of ovulation». Human Reproduction14 (7): 1835-1839. ISSN1460-2350. PMID10402400. doi:10.1093/humrep/14.7.1835.
Dunson, D.B.; Baird, D.D.; Wilcox, A.J.; Weinberg, C.R. (1999). «Day-specific probabilities of clinical pregnancy based on two studies with imperfect measures of ovulation». Human Reproduction14 (7): 1835-1839. ISSN1460-2350. PMID10402400. doi:10.1093/humrep/14.7.1835.