This game is great, just finished it I think. But I only went through 3 stages, in the menu it says there are 3 more I haven't seen. Are those not in the game yet? I killed the elevator cabbage boss, the giant hand monster, and the other giant hand monster in the lab before getting the end credits. Maybe I missed some secret rooms?
EDIT: Also I was wondering where the "Pregnancy" Comes in, I thought it might be the floating flowers kinda like the flies do in Parasite in City but they don't seem to actually do anything but attack the player.