Several studies have found that women who use birth control pills may experience a reduction in the volume of their hypothalamus, a part of the brain that plays a crucial role in controlling various functions such as sex drive, mood, and hormone regulation.
https://www.livescience.com/birth-control-brain-hypothalamus.htmlhttps://www.sciencedaily.com/releases/2019/12/191204090819.htm"had significantly smaller hypothalamus volume, compared to women not taking the pill"
https://en.wikipedia.org/wiki/HypothalamusThe hypothalamus controls body temperature, hunger, important aspects of parenting and maternal attachment behaviours, thirst, fatigue, sleep, circadian rhythms, and is important in certain social behaviors, such as sɛҳuąƖ and aggressive behaviors.
https://en.wikipedia.org/wiki/VasopressinSome AVP may be released directly into the brain from the hypothalamus, and may play an important role in social behavior, sɛҳuąƖ motivation and pair bonding, and maternal responses to stress.
https://en.wikipedia.org/wiki/OxytocinIn humans it plays roles in behavior that include social bonding, love, reproduction, childbirth, and the period after childbirth. a hormone in response to sɛҳuąƖ activity and during childbirth.
In its natural form, it also plays a role in maternal bonding and milk production.
Research has shown that oxytocin, often referred to as the "love hormone," can promote ethnocentrism and potentially contribute to racial bias. A study by Carsten de Dreu found that oxytocin makes individuals more biased towards their own ethnic or cultural group, leading to favoritism and derogation of outsiders.
Birth control pills contain estrogen and progesterone
Progesterone inhibits oxytocin's function in the brain by directly binding to the oxytocin receptor (OTR) and altering its conformation, which prevents oxytocin from binding effectively