My advise, go to register with a KK for the pink book . It is for in case of emergency case. The pink book is helpful for the following events :-

1) You are away from your usual location & you cannot make it back on time to deliver at the regular check up center.

2) In case the private medical center decline to accept your case last minute because of complications . This happened many times before, the private medical center is not as good as they are painted.