Advertisement

What weight should I be if I'm 21 weeks pregnant with twins?

Basedon only the information we know, which is that you are having twins, I will assume they are fraternal (because this is so much more common than identical) and that you have reached the 20th gestational week. On average, according to a Clinical Physiology in Obstetrics 2nd ed. Oxford, the following contribute to total maternal weight gain by the 20th gestational week:

fetus #1 - 0.67 lbs.         
fetus #2- 0.67 lbs.
placenta #1 - 0.37 lbs.        
placenta #2 - 0.37 lbs.
amniotic fluid #1 - 0.77 lbs.
amniotic fluid #2 - 0.77 lbs.
uterus - 0.70 lbs.
breast enlargement - 0.40 lbs.
fluid retention - 0.10 lbs.
maternal "stores" - 4.51 lbs.
Total - 9.33 lbs.

I have observed a very, very wide range of weight gain in my patients carrying both singleton and multiple pregnancies and have usually noticed healthy maternal and neonatal outcomes. That is not to say that those patients who are very malnourished or very obverse do not suffer from more complications of pregnancy than those who are not, and these patients should have specific nutritional recommendations discussed with their care-providers. Be assured that the specific weight gain increment, or lack of it, is less directly linked to pregnancy outcome than is popularly portrayed. 

Continue Learning about 2nd Trimester Of Pregnancy

Is 19 weeks too early to determine the sex of my baby?
Margaret L. McKenzie, MDMargaret L. McKenzie, MD
The sex of your baby can be determined at 19 weeks. Watch this video to learn the ways doctors c...
More Answers
Why is my blood pressure important in the 2nd trimester of pregnancy?
Honor Society of Nursing (STTI)Honor Society of Nursing (STTI)
You blood pressure is so important during the 2nd trimester of pregnancy because this is when many b...
More Answers
Healthy Pregnancy: Your Second Trimester Guide
Healthy Pregnancy: Your Second Trimester GuideHealthy Pregnancy: Your Second Trimester GuideHealthy Pregnancy: Your Second Trimester GuideHealthy Pregnancy: Your Second Trimester Guide
Learn about your baby’s development, as well as any aches, pains or conditions you may experience during the second trimester.
Start Slideshow
If I'm Pregnant, Should I Be Worried About Spotting?
If I'm Pregnant, Should I Be Worried About Spotting?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.