Re: the 'try for a baby' bug
If they can woohoo but there is no option to try for baby it is most likely that the pregnancy would exceed to maximum number of sims in a household (8).
What you describe sounds like a Mod issue.
Move your Mods folder to the Desktop and delete localthumbcache.package. Then test the game
If it works now check for updates to your Mods and CC. Add it back a little at a time while testing until you have found all that are broken.
