Reproductive Endocrinology · Ovulation Physiology

Symptoms and hormonal changes accompanying ovulation

Billings EL, Brown JB, Billings JJ, Burger HG

Published February 5, 1972 Lancet (London, England), 1(7745), 282-284
DOI 10.1016/s0140-6736(72)90291-7 PMID 4109930
Read our synopsis

RRM Academy Synopsis

Peak Mucus Symptom Usually Fell on or Just Before Ovulation

In 1972, doctors studied 22 married women with proven fertility. They tracked mucus changes and compared them with hormone levels. Peak mucus fell on or just before ovulation in most women. Mucus changes usually started about a week before ovulation.

Key Findings

  • The clear, slippery peak mucus symptom showed up on the day of ovulation in 5 of 22 women. It showed up 1 day early in 9, and 2 days early in 4.
  • Mucus symptoms began a mean of 6.2 days before ovulation, ranging from 3 to 10 days across the 22 women.
  • Ovulation occurred a mean of 0.9 days after the peak mucus symptom, ranging from 3 days after to 2 days before in one woman.
  • Basal body temperature generally rose 1 to 2 days after ovulation, later than the mucus-based signal in this group.

Interpretation

This is a small case series from 1972 with no control group. The study offers hormone-based support for the Billings Ovulation Method, described a year earlier. All 22 women were healthy, married, and already known to be fertile, so the results describe a narrow group. They do not describe the general public. The study used hormone measurements as its estimate of the ovulation day. Two women needed extra assumptions because blood draws missed midcycle; one woman's hormone measurements were inconsistent. The study shows a link between a mucus pattern and hormone-confirmed ovulation. The paper does not test how mucus charting works for avoiding or achieving pregnancy in daily life.

RRM Context

This 1972 study is an early evidence base for the Billings Ovulation Method. Billings is one of several fertility awareness based methods used in restorative reproductive medicine. The study found a mucus pattern that lines up with ovulation. The finding still shapes mucus charting today. Later, bigger studies have tested these timing rules further.

Abstract not indexed.

Topics

By this author

Related research

Reproductive Endocrinology › Ovulation Physiology › Follicular Development · Menstrual Cycle › Cycle Biomarkers › Hormonal Markers · Fertility Awareness › Biomarkers › Basal Body Temperature
Hansjörg Burger
H Burger
PMID 4109930 4109930 DOI 10.1016/s0140-6736(72)90291-7 10.1016/s0140-6736(72)90291-7 Billings et al. 1972, Billings 1972

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