My dp is an only child, his mum was also pregnant with a girl, which was stillborn. dp first relationship resulted in two healthy boys and a stillborn (girl). We have a son together and i'd like to have another, either but girl would be nice. dp doesn't want anyomre boys and is adamant that because of his history there is no possible way he could conceive a girl. anyone know of medical reason why this would run in the family. There are no girls on my side of the family either and although i have an older son, i did have a miscarriage before him, but did not know the sex.