Artiste -“All I’m trying to find out is if this issue is likely to be hereditary. Obviously I can ask the shadchan to find this out but I don’t think that that would be a decent thing to do.”
So what is the decent thing to do? Make up scenarios in your mind? If this bothers you, which obviously it does, you have to find out what issues did these woman have. The Shadchan is probably the only one who can find out. If you find out that it’s something genetic that affects fertility, you can research whether the disorder is one dominate gene and one recessive or two recessives causing the disorder. Once you have this info, you’d have to test the father if he is a carrier of this gene that causes this problem. Once you have all of this, then you can plug in all this info into the Mendelian genetics theory.
But since this requires testing on their part – guess what? they will balk. So basically it comes down to either accepting that there might be a higher percentage that this girl is infertile, more than others, or not. In my belief they won’t go through all this just for you to have a definitive answer of what the percentage is. But tell them I’m available, so your son is No great loss.