I have an aunt and uncle who have six children (בלי עין הרע) and every single one of those children made a פדיון הבן!
I once tried to calculate the odds of that happening. To calculate the odds of anyone making a פדיון הבן there are a number of factors that must be calculated. We can try to approximate:
- Let's assume that the child themselves is a ישראל, otherwise it's a non-starter. So we need to know the odds of their spouse not being a Levite (80% based on my snooping of our shul's membership database.)
- The first fetus has to be male (let's just say 50%)
- The baby must be delivered and not miscarried (let's use 90%)
- The baby must be born without a Cesarean (again, 90%)
So the odds of anyone making a פדיון הבן are only about 32%. The odds of going 6-for-6 are a mere 0.12%