That is one of the biggest things I don't like in the game--- that fact that the mothers take so long to 'nurse' the babies. They should work--little things, maybe gather some of the fruit, research, etc.--- and let them go a lot quicker. But other than that, I love the game!
Maybe they'll change that time on the next game *hint, hint*
Hope they do another one-- I think many people would be upset if you didn't!