So, I have a faux medieval fantasy setting. (Not perfect, but close.) And I have a character that has had one child and I would like for there to be a medical reason for her not to be able to have anymore.

"Medical" for the times, that is.

How did midwives and so-called girl-part experts back then know if a woman was unable to bear children? It can be either that she has tried forever and nothing has happened (and we know the man is capable because he has sired other children). Or, it could be that she has to avoid sex because if she does get preggo, it would mean her death.

Any ideas?