it's only statistically improbable to get 7 sons (in a row) if you have all couples that create 7 children have a 50/50 chance of son/daughter. If you have a r

it's only statistically improbable to get 7 sons (in a row) if you have all couples that create 7 children have a 50/50 chance of son/daughter. If you have a reason why a couple will only produce sons (genetics) then it becomes much less surprising.