Anyone else think that's weird ?

Me and my boyfriend have been together for 6 months and bam I'm pregnant due dec 26th from what he says though his ex wife and him tried for seven years and she never got pregnant they even had help and it didn't happen so he thought he couldn't have kids well she ended up having one two years after they broke up. I just think it's crazy. But I'm so excited and family doesn't know yet.