Use the baby boost. It cost $500 but it will help you make a baby.

When your parents are 56 - 58 dont try to make a baby in virtual families
It will probaly not work !!! Try to believe me i tries

If it doesnt work the first time there are two options.
1. You wait a bit before you try for a baby and keep trying if it doesnt work.
2. Purchase baby boost for $500 it increases the chances for babies

No need for baby boost, just keep trying! But, wait a bit before trying again.. However,
if u had tried more than 10 times.. Use the baby boost!

Well then your going to have to buy the baby boost to make them have a baby or two... Go
to the medicine department and click on the red colored shot.

U get them to try having one while there trying press the nearest top bunk bed until they
come out and they should have one
Hope it works:)