How soon after impregnation will my cat show signs?

Cat pregnancy lasts about two months, so once they become pregnant after their heat cycle, unless you see those subtle signs, they'll start showing their pregnancy in the last few weeks. Around six to seven weeks from when their heat cycle ended, you would start to see the belly growing. They would probably stop the screaming and yelling, and that might make you suspicious because if they don't find a suitor during their heat cycle, they will go back into heat every couple of weeks. So if it's been a while, that may be a sign.