Unlike adults whose age is measured in years, babies are first measured in days, weeks and months. So at what point should you start counting in months instead of weeks? Here’s a general guide based on the standard used by most parents and medical professionals.
BABY is counted in days up till day 7 (1 week).
BABY is counted in weeks up till week 4 (1 month) OR week 6-8 (generally for needles and health checks).
BABY is counted in months based on the date each month following that on which they were born.
For instance, if the baby was born on January 3rd, the baby would be 3 months on April 3rd. This calculation is used because the number of days in a month vary – there are 52 weeks in a year but 48 if counted in strict 4 week months (12×4=48). Therefore, using the date on which baby was born makes for the easiest calculation.