I know the appropriate term here is "sex" not gender but I didn't know how to word it other than "Is sex 50/50?" And that sounds weird.

I know the chances of having a boy or a girl are basically 50/50, but sometimes I can't help wondering if sometimes genetics are at play.

I'm expecting a little boy (so excited!!!!) in February. DH is the baby of six grandchildren by his paternal grandmother. This will be her 7th great grandchild and also 7th great grandson. ALL boys. She also had 3 boys (one being DH's father) and 5 of the 6 grandchildren are boys, just DH's sister being the odd one out. And she's definitely an odd one out sometimes. His granny was noticeably disappointed that this baby wasn't a girl (Ugh. We can get into that later).

It just seems like its genetic. Is it really up to chance that there are SO many boys in this family?