Human Reproduction · 2015 · 17 citations · 20 references
This study (project #90905) was funded by the NDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP). D.G.C. currently works for a diagnostic development company, Science Haven Ltd. The other authors have nothing to declare.
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SYMPTOMS AND HORMONAL CHANGES ACCOMPANYING OVULATION
Elanaria Billings, J. B. Brown, J.J. Billings et al. · The Lancet · 1972 · 245 citations
J. B. Brown, L. F. Blackwell, J.J. Billings et al. · American Journal of Obstetrics and Gynecology · 1987 · 90 citations
Family Health, Human Population Planning, Natural Family Planning +4