Menstrual Cycle & Reproductive Hormones

Explore cyclic sensitivity, estrogen shifts, progesterone balance, ovulation patterns, and premenstrual reactivity.

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Watercolor illustration of a woman tracking menstrual symptoms related to estrogen and histamine
Menstrual Cycle & Reproductive Hormones

Estrogen and Histamine: How Strong Is the Hormone Connection?

Estrogen can affect mast-cell signaling, but the popular estrogen–histamine feedback-loop theory goes further than current human evidence can prove.