Hi Darstan64. The adults will only try for a baby when you deliberately put them together and their action says "Trying to make a baby." If you're interested in some helpful tips, etc, we have BayouBlonde's Helpful VF Answers and Post Index for the original Virtual Families, and Helpful VF2 Windows/Mac Tips & Answers for Virtual Families 2 that can help get your families off to a good start!