Wilcox, A. J., Baird, D. D., Weinberg, C. R. Time of implantation of the conceptus and loss of pregnancy. New England Journal of Medicine. 1999, 340 (23): 1796–1799. PMID 10362823. doi:10.1056/NEJM199906103402304.
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Wilcox, A. J., Baird, D. D., Weinberg, C. R. Time of implantation of the conceptus and loss of pregnancy. New England Journal of Medicine. 1999, 340 (23): 1796–1799. PMID 10362823. doi:10.1056/NEJM199906103402304.
Díaz, S., Cárdenas, H., Brandeis, A., Miranda, P., Salvatierra, A. M., Croxatto, H. B. Relative contributions of anovulation and luteal phase defect to the reduced pregnancy rate of breastfeeding women. Fertility and Sterility. September 1992, 58 (3): 498–503. PMID 1521642.