At first, it started with MCCC not working, despite being the most up to date version of the mod, that is reported to be working. I removed all mods from my game, and played that way for a few days. Then, my sim tried for a baby, but afterwards, there was no option to take a pregnancy test at the toilet. My sim was pregnant, according to CAS, but there was no way of knowing otherwise.
I removed all mods. all cc. I tried starting a brand new save file, but the issue persisted there. I uninstalled and reinstalled my game. Still the issue persisted. I can think of nothing else to fix this issue.