how to calculate how many months old baby is?
['4 Weeks = a couple of days shy of 1 month (it will depend on which month your child was born in)', '8 Weeks = almost a week shy of 2 months.', '12 Weeks = one week shy of 3 months.', '13 Weeks = 3 Months old.', '16 Weeks = about a week and a half shy of 4 months old.', '17.5 Weeks = 4 months old.']