My vault dwellers haven't been able to give birth to any male babies. I've had about 10 pregnancies but they all were girls.

I'm wondering if this caused by a bug in the game or is it just based on luck?

1 Answer

I guess this is just a matter of probability. The probability to get children of only one gender is (1/2)¹⁰ which is 1/2¹⁰ which is 1 in 1024, which is about 1 tenth of a percent (~ 0.1%). Not really impossible, only unlikely.

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