if u go to govt KKIA, they will do blood test and urine test during every visit.
at my private gynae clinic, they did urine test only, but not as detailed as govt KKIA.

Maybe u need to check with your doctor. Perhaps they are not doing so much test cos your wife is in the low risk category.

At KKIA i used to hv pretty good amount of blood sucked out each time due to my low blood count