Study: Some Women Allergic To Own Hormones POSTED: 2:38 pm EST March 31, 2006 Email This Story | Print This Story Millions of women suffer from migraines and other aches and pains right before menstruating. A new study out of the University of Texas at Austin indicates these women may actually be allergic to their own estrogen and progesterone hormones. Researchers said women who experienced these health changes during their cycle have higher levels of a certain antibody against hormones than other women. An increase in antibodies is usually associated with an allergic reaction. Researchers said this could some day help shed light on unexplained illnesses, such as fibromyalgia and interstitial cystitis.