Declines or erratic fluctuations in estrogen can precipitate migraines in some women. Causes from menstruation to breastfeeding could be to blame.
Gut-brain Axis and migraine headache: a comprehensive review, The Journal of Headache and Pain
Estrogen: The necessary evil for human health, and ways to tame it - ScienceDirect
Menstrual Migraines: Cause or Coincidence?
Combined hormonal contraceptives and migraine: An update on the evidence
Migraines during Menstruation: The Impact of Low Estrogen - VELL
IBS and Migraines: Is There a Link?
Migraine Headache: An Under‐Appreciated Risk Factor for Cardiovascular Disease in Women
Migraine World Summit - Have you noticed a connection between your hormones and migraine attacks? According to Dr. MacGregor, about 50% of women who experience migraine will report a link between their
Does Birth Control Increase Stroke Risk in Women With Migraine?
Migraine in women: the role of hormones and their impact on vascular diseases, The Journal of Headache and Pain