The current expectation is that every ovulatory menstrual cycle will have a luteal phase (the time from egg released until the next flow) that lasts approximately 14 days.
University of British ColumbiaOct 7 2024 The current expectation is that every ovulatory menstrual cycle will have a luteal phase that lasts approximately 14 days. It is simple, ovulation covers half of the expected, classical 28-day menstrual cycle. That fits with another current concept, "All regular month-apart menstrual cycles are ovulatory."
The findings, just published in Human Reproduction, show that the luteal phase is quite variable. It was documented using the validated Quantitative Basal Temperature© method. By QBT©, a normal luteal phase length is ≥10 days; short luteal cycles are <10 days. An amazing thing is that, despite rigorous screening, only 6 of 53 women had normally ovulatory cycles the whole year. Fifty-five percent of women across the study year had more than one short luteal phase in an ovulatory cycle."
Related Stories"I wish I had known that my perfectly regular, month-apart menstrual periods might have hidden silent ovulatory disturbances that could make fertility difficult for me," said Sophia Park, MD, FRCPC, MBA, associate clinical professor in Pathology and Laboratory Medicine at the University of British Columbia with the lived experience of infertility.
Ovulation Reproduction Research
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