Odds of Having a Boy 51/49- Here is a breakdown. It may be a little confusing but it makes sense.
The odds of having a boy seem to increase after having girls, except after 2 girls, when a 3rd girl is more likely.
The odds of having a girl seem to decrease after having each boy, but only very slightly. Even after 3 boys, you are only 6.4% more likely to have a 4th boy than a girl.
Odds of Having an All Same-Gender Family
If there are roughly even odds of having a boy or a girl with each baby, given the laws of chance we should still expect to see some all same-gender families, even in large families. Here is the number of all same-gender families we would expect to see, purely by chance:
Family Size Same-Gender Mixed-Gender
2 Children 50% 50%
3 Children 25% 75%
4 Children 12.5% 87.5%
5 Children 6% 94%
6 Children 3% 97%
7 Children 1.6% 98.4%
Gender and Birth Order
Given the charts above, it looks like you are slightly more likely to have a boy, regardless of previous children. This is probably due to the overall 51/49 boy/girl birth ratio. This ratio, interestingly, varies slightly with birth order; it isn’t consistent among first-borns, second-borns, etc.
1st Born 51.0% Boys
2nd Born 52.2% Boys
3rd Born 48.6% Boys
4th Born 50.8% Boys
Well here it is if you haven’t heard already! See if you can figure it out by these pictures.

If you are bad at figuring out ultrasounds… it’s clearly a boy! Now I will take any boy name suggestions. I’ve been thinking of ONLY girl names the past 4 months. I had the best girl names. Oh well. I love my boys and can’t wait to meet my 3rd little man.


































































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