system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do pregnant women experience specific cravings?

Is there any science behind pregnancy cravings? I remember being told in my youth that the concept is a myth, is that so?
gpt
When a woman is pregnant, her body starts to pump around all kinds of hormones (special substances that cause different parts of the body to do specific jobs, so that the body knows it needs to feed and take care of the child growing inside her womb). It's these hormones that cause women to feel emotions (or cravings) that she normally wouldn't feel - similar to how women can get more upset during their menstrual cycle: it's all got to do with hormones.