Gestational age from weeks + days to total days
In general, gestational age is provided in completed weeks and days (e.g. 36+5). For the Perined Birthweight Charts calculation, however, completed days are used. The easiest way is to use a simple calculation within CastorEDC to calculate your gestational age in days. In this example, I have created two variables for completed weeks and days and combine them using the following calculation to obtain total days.