The 28-day female-hormone cycle {menstrual cycle}| has high estrogen for 21 days and high progesterone for 7 days, with estrogen increasing until day 12 after menstruation and then progesterone increasing until day 21. Luteinizing hormone and follicle-stimulating hormone maximize at 14 days.
Egg release {ovulation}| is at menstruation-cycle day 14, when luteinizing hormone and follicle stimulating hormone peak.
4-Zoology-Organ-Endocrine Gland
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Date Modified: 2022.0225