Baby Math
The calculation of how many kinds a woman can have in relationship to when she meets the right guy or the calculation of how long a woman can wait before starting a family in order to have her ideal number of children.
Counting backwards from 38 is the easiest way to calculate baby math. For example, if a woman wants three babies, she need a minimum of about 4 years so she needs to start having babies at age 34. Subtract one year of marriage pre-baby and one year of dating, and you come up with age 32 as when a woman needs to find the man she will eventually have those babies with.