That ' s not what I said at all . Of course hormones affect me if they didn ' t I would probably have gotten pregnant by now since my pills didn ' t stop ovulation . And maybe the hormones did increase my appetite slightly as well , but I didn ' t gain weight because I have always maintained a stable weight due to mindful eating and exercise . What I said is that hormones don ' t switch on set changes in a simple cause and effect way . The BC pill doesn ' t make extra weigh just appear on a woman ' s body . A hormonal change around 30 doesn ' t make a woman suddenly want kids regardless of her situation and convictions on the matter . The effects are so much more subtle than that , and the resulting physical or behavioral changes if any , are very much dependent on the person ' s existing habits , traits , and conditions . So to suggest that any woman who doesn ' t like or want kids should expect to have a change of heart in her 30 s because of hormones is a dismissive generalization .