I am a 30 year old female. Considerably healthy. I recently had a baby 4 months ago and was tested on 1/5 and 2/9. My creatinine the first time was 1.1; 1.0 the second time. BUN absolutely normal both times. GFR was 58 the first time and 65 the second time. I had an ultrasound of my kidneys and bladder. All normal. No hydronephrosis. I was told I may have CKD, but no problems with BP and not diabetic. No genetic kidney disorders in my family. No protein or ketones in urine either. I am confused. My doctor is not offering advice and I have to wait on my referral to Nephrologist for a few months. Any ideas? I am also asymptomatic.