FHA caused by hormonal birth control
The chemicals in the pill essentially “switch off” your hypothalamus and it eventually stops communicating with your pituitary gland. Your pituitary then stops communicating with your ovaries. FYI: Your hypothalamus’ job is to release Gonadotropin-Releasing Hormone (GnRH) to the pituitary gland. Your pituitary then sends Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) to your ovaries. This in turn causes your ovaries to produce estrogen and progesterone. Estrogen and progesterone then send a signal back to the hypothalamus to slow down the release of it’s hormones. This is a tidy little feedback loop.