In this case, even if your baby is 4 months old, you should expect her to have the developmental skills of a 2-month-old term baby.
If she is now 4 months old (16 weeks since birth), her corrected age is 2 months. If your baby was born at 32 weeks' gestation, she was 8 weeks (2 months) preterm. To determine the number of weeks' preterm your baby was at birth, subtract gestational age at birth from 40. (A pregnancy is now considered "full term" at 39 weeks.) Calculating corrected age isn't difficult.īegin with your baby's actual age in weeks (number of weeks since the date of birth) and then subtract the number of weeks your baby was preterm. By looking at the difference between them, you can adjust your baby's calendar age to account for prematurity and calculate his or her corrected age.ĭuring the first 2 years, using your baby's corrected age will give you a better idea when he or she should reach common developmental goals. When you measure your baby's development-that is, when you look at what is "normal" for your baby's age-consider both of those dates. If your baby was born early, you have 2 important days to mark on the calendar: the day your baby was born and your estimated due date.
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