Why do people congratulate a woman for being pregnant?

Crowferret
I've honestly never heard of someone get congratulated for (at least from what I remember) up until I became pregnant myself. Just everytime someone said it to me, I just feel like I'm out in a uncomfortable position because having children wasn't on my bucket list in the first and I would have to refrain from telling people not to do that, but then I would be a buzz kill or people might think something's wrong with me for not saying thank you. Even people who knew I didn't want children asked if I was excited and wouldn't take the hint even I kindly remind them, some were more understanding than others and asked how I felt.
Why do people congratulate a woman for being pregnant?
14 Opinion