How did the boys die? What were the symptoms? Did the girls marry and have boys??
I don’t know what the symptoms were, only that my grandmother said the doctor referred to them as “blue babies). My mother was RH negative, so at least one of her parents was, but even if my grandmother was RH neg and the baby positive, it wouldn’t explain why this would be gender-specific.
The babies were born between 1910 and 1930. My parents researched their family’s records and could find neither birth, death nor baptism records for any of the boys. They were born in Canada.