Birth control impacts women’s memories Hormones hold immense power over women’s lives, so it’s no surprise that hormonal birth control also influences female brains. Many birth control pills deliver an extra amount of progesterone to the body. Progesterone is a hormone that affects the way women process memories, which means even a little extra will have a huge impact. During one study, a group of women was shown a video with an injured boy. Those women who were on progesterone based birth control were more focused on the narrative of the story, while those who weren’t on birth control, remembered specific details better. Their memory just worked in different ways!