This game is the best but I need help!

My tribe was thriving, lots of food, tech, etc. Then yesterday, I forgot to check up on them at all and so the fire went out. Today, I checked back with the game and five people died! I was left with three villagers, two guys and a girl. I made the fire again and then went to increasing population. On the first try I got a baby, so I was kinda excited. About an hour ago, she stopped carrying the baby around so I tried to make another baby, but it hasnt worked at all. I need help because she is probably going to die of old age soon, and if she does I wont be able to get more villagers! They will ALL die :( So, are there any special stratagies or something i dont know that help fertility (i have medicine level 2 but its almost like it reduced my fertility rate!)

Lady somone about Virtual Villagers 2 Lite