Whally: nah,nt really accurate
You didn't do it well.
How to know your mum's age when she had his or her first child.
this only work with first born child.
2. With that of your age.
the day and month doesn't matter here, all that we want is the year we're in and the date we're born.
if still can't get it, then I got nothing to add again....
Source. Me