My villagers go indoors but none of them are making babies. Is there any way I can improve the chances? I already have Level 2 of Fertility.

how many Villagers do u have -- how many huts have they built -- if there isnt enough housing they wont make more babies

sometimes they are stubborn too -- I've had to throw one woman at every guy in the tribe at least a dozen times before she got pregnant

If you can get a woman's Skill up to Trainee Parent sometimes they will keep going after the men themselves til they get a baby

Be Careful - dont throw men at the women --- if a man gets too exprienced in breeding -- your entire tribe will be pregnant and it will be a Pain trying to get some work done