Re: How to get pregnant
I play on Mac, but I assume it's the same for conception. Your friendship and romance need to be high enough to 'woo-hoo', and if you go into the romantic options 'try for a baby with ______' should be about as deep into those options as 'woohoo with_____' when you click on the bed, etc.
Actually, if you need more information about the subtleties of the process, I just found this link that should help: http://www.carls-sims-4-guide.com/relationships/woohoo.php