Actually in NFHS 1 there is information for children born in the four years preceding the interview. Using the Individiual Recode file, you can calculate the births in the last 4 years as follows:
gen kids = 0
foreach b of var b3* {
replace kids = kids + 1 if v008 - `b' < 48
}
I also discovered that in this survey, although v208 is labeled births in the last 5 years it actually contains births in the last 4 years. You can verify this by comparing v208 to the kids variable as follows:
So thus you can use v208 for this survey.