system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can birth control methods still cause weight gain even if your healthy diet and exercise remains consistent?
gpt
So birth control works by using two hormones; progesterone and estrogen. The estrogen will make it so that your ovary will not release an egg. The progesterone works by making the natural fluids in your uterus thick so an egg cannot implant. The weight you gain is most likely just water weight. If it's a larger amount of weight, it may not be the birth control causing it. (I work in the medical field)