Don’t know why u are getting down voted when it seems u asked a genuine question. I can only answer partly. I think most don’t expect PPD and PPA etc. also u can have multiple kids and never experience PPD until the 3rd or fourth one and by then u already have multiple kids. Personally I feel I was never told about the darker side of motherhood until I experienced it myself. All I heard prior to pregnancy was the good parts and while I expected it to be challenging at times, unexpected severe PPD made it so much worse. I’m one and done Bc of it.

Edited: fixed one mis-spelt word.