Dos Yaochid: Yes, but you should remember the medroashim that all the Avos had to davven for kids. The chumish clearly states that they were an “Akarah” (barren without children). Sarah gave Hager to Avroham as a wife. Yitzchok & Rivka davvened in seperate corners. Rochel tells Yaakov that she like a dead person if he does not give her kids.
Hmm, I just wonder if these emaous were around today will this potential mother in law reject them?
This girl is only a safek, and not even that! The fact that she was born with assistance shows her mother did have children. Don’t forget, males also contribute to this issue. I would suggest thatthe girl request that this boy undergo testing to show he can provide children. Just to be sure.