My wife is renal transplant patient 6years ago.2 years back she had a baby thru cesarean. Since then she has had 4 episodes of urinary tract infectio?

Needs evaluation. The utis may or may not be related to some birth trauma. She should be evaluated by her gynecologist and transplant team for possible causes that can be corrected.
Good Q 4 Renal, etc. First, as a maternal-fetal medicine subspecialist, I am pleased to hear about your family. I will gladly refer this to doctors on healthtap who are specialists in kidney and infectious conditions. Thank you for asking @drpam.