If you want women to be your units of analysis, then you work with the IR file and just the most recent birth, which has index _1. For example, m3a_1 tells you whether a doctor was in attendance at the birth of the most recent child. When women are the units, you have to pick one birth.

If you want children to be your units of analysis, then you use the KR file. For example, open a KR file and enter "tab bidx m3a". Here bidx is the order of the birth in the past five years (bidx is 1 for the youngest child) and m3a tells you whether a doctor is in attendance at the birth of that child. In both the IR and KR files, the wealth index (in quintiles) is v190.

For some surveys the information about the delivery is only given for the most recent birth in the past five years, not for all births in the past five years.

I can help you with Stata but not with SPSS or SAS.