Whats birth interval??!
Question: It's the interval between having children - if your children are 2 years apart in age, that's a two year birth interval.
Answers: It's the interval between having children - if your children are 2 years apart in age, that's a two year birth interval.
Birth interval means birth date to birth date. It has to do with fertility between childern and the time in between childern and how long you should wait.