Abstract

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Topics

Billings ovulation method symptoms hormonal changes, cervical mucus symptom ovulation hormone correlation, Billings EL Brown JB ovulation symptoms 1972, hormonal changes accompanying ovulation clinical signs, ovulation symptom recognition fertility awareness method, estrogen progesterone ovulation symptom correlation, natural family planning ovulation symptom identification, Billings method scientific basis hormonal validation, ovulation mucus symptom LH surge hormones, fertility awareness ovulation detection body signs
PMID 4109930 4109930 DOI 10.1016/s0140-6736(72)90291-7 10.1016/s0140-6736(72)90291-7

Cite this article

Billings, E. L., Brown, J. B., Billings, J. J., & Burger, H. G. (1972). Symptoms and hormonal changes accompanying ovulation. *Lancet (London, England)*, *1*(7745), 282-284. https://doi.org/10.1016/s0140-6736(72)90291-7

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