I watched this movie on Netflix, maybe a year ago now. Its not very old.
The woman was a doctor. She and her husband moved to an Island (his hometown I believe). If I remember correctly only boy children were wanted due to some cult-like belief all the men had.
Some details I can recall:
She finds a body of a missing woman in her yard.
She befriends a female cop that starts to help her figure out what’s going on.
her husband was the reason she was infertile.
There’s another small island that houses pregnant woman. They take their babies and give them away. This doctor and her husband were close to adopting one.
Husbands father leads the cultish group.