199 Physicians Online


Does insulin cross the placenta?

Dear Ask The Doctor:
I'm pregnant with type two diabetes and was wondering does insulin cross the placenta? If so what harm does it do to the unborn child? I'm injecting a pretty good amount of insulin to control my blood sugar.


Insulin crosses the placenta in very small amounts, insufficient to cause any harm to the unborn baby. On the other hand, increased sugar levels may affect your baby with macrosomia (large baby), birth defects, hypoglycemia after birth, increased chances of C-section due to large baby etc. Thus you need not be concerned about the increased amounts of insulin, but need to keep your sugar levels in control to avoid any harmful effects on your baby.


Sign In to join in the conversation.

You’re in good hands, meet ATD’s founding physicians.

Dr. Suneel Sharman

  • Board Certified GP
  • CMO ATD Health Network Inc.
  • Adjunct Professor at U Of T

Dr. Kunaal Jindal

  • Board Certified Plastic Surgeon
  • Director ATD Health Network Inc.
  • Fellowship Training Atlanta, GA

Related Answers:

I am a 40 year old active female, no weight issues (5’10, 130Ibs), 18% body fat. Slightly high Fasting Blood G...

I just accidentally injected 35 units of air instead of insulin into my stomach. Will I be ok?

I started training for the 5k about two months ago to reduce my weight, help control my blood sugar, and high blood p...

41 year old female, 5’10, 133 Ibs, no medications, active, no other medical problems, eat very healthy diet wit...

41 year old active female, NOT overweight ( 5'10, 130Ibs), on no medications, good BP & Cholesterol, no other med...

I am diabetic for almost 20 years. I was taking tablets till Mar 2015 and in Mar 2015, I switched to Insulin. My ...

I'm worried that i may be developing diabetes or some other kind of blood disorder...over the past day or so i feel l...

A recent urinalysis shows the following comment "Bilirub UR Q1 Strip - Small 1+ ...A (abnormal). I'm 64, male an...

My daughter is 24 weeks pregnant and has been diagnosed with gd two weeks ago. She finally got a tool to check her b...

Dear Sir, I am a diabetic-2 patient, I am 37 years old, having weight 68 KG. I am getting the dose of (Glimepiri...