Hi, I have a female cat (Boo), she's only 11 months old, and she was in heat two weeks ago. Now, one day when she was in heat, I brought a male to get her pregnant. I locked them up for almost 24 hours, and then released her because she hated the male and kept fighting with him. Anyway, two weeks later here we are, and I keep checking her nipples to see if she's pregnant or not but I can't tell, because I've never seen a pregnant cat before. And to be honest i'm not so sure if she mated with the male, because she stayed in heat for 4 more days after he left. So I don't know, I took pictures of her nipples for you experts to help me.