After unprotected sex I need to find out she is pregnant or not I need avoid pregnant how to identify?

Easy! Talk with her. If a man wants to find out if his wife is pregnant, all he has to do is ask her, 1 month after having sex. By then, she will have missed her period if she is pregnant. However, life gets more complicated if the woman has irregular periods. Then, a urine pregnancy test from the drugstore will be needed. So, communication is the key!