I went looking for Ending information because I could have sworn there was a way to stay with
the crazy nurse Leah. I swear I saw a post saying she could get pregnant. After multiple attempts, no joy on that ending. However, afterwards, I found a post that details all the endings. With the variations there are over 20 different endings for this game.
Endings in Spoiler --> Check this post if you want to see all the variations. Personally, I've never done the Ana endings, because she is trash and reminds me of my ex and in all but one, I was best bros with Liam (I that was a quick run through to get a specific scene that I missed.)