There appears to be an issue with gender RNG. Having all colonists in the same gender isn’t exactly great from the game play perspective. I am at game year 6 right now and the only Female colonist I ever had came as immigrant at very old age, she had only about 20-30 days before passing. Now I got 6 colonist and 2 dead from an old age.
I tried to edit the save games to alter genders but the file are protected by CRC of some kind making edit attempts next to impossible.
The change of getting 8 colonist of same gender in a row with a pure RNG is 1 out of 256