Get Virtual Care
For Businesses
About Us
A member asked:
Can the afp blood test be done during pregnancy at 21 weeks or will this affect the results.?
2 doctors weighed in across 2 answers
Yes, and depends: Alpha feto protein in maternal serum can be quantitated at any time, during pregnancy. Why is the test being done at 21 weeks? AFP measurements are done for two main reasons; (1) screening test for fetal neural tube defects (2) screening for liver cancer. Levels during pregnancy vary with the time of gestation.
Answered 6/24/2014
5.8k views
Until 20-22 weeks.: Different labs have different cut-offs, however the most appropriate time to check msafp is between 16-20 weeks. Some labs go between 14-21/22 weeks.
Answered 12/9/2013
5.7k views
Related Questions
A member asked:
I got a blood pregnancy test done today (5 weeks and one day since my last encounter). Can i trust the result if it comes back negative?
A doctor has provided 1 answer
A member asked:
Does urine pregnancy test give negative result during 2nd trimester in pregnancy? Please tell me what result will home urine pregnancy test show in that case, not blood or usg.
A doctor has provided 1 answer
A member asked:
Which blood test will show pregnancy results and after how many days of missing of periods it should be done?
A doctor has provided 1 answer
A member asked:
Had unprotected sex jan 31st. i had a blood pregnancy test done march 5th. it was negative. would those have been accurate results? i had period also
A doctor has provided 1 answer
A member asked:
Cytomegalovirus (cmv) during pregnancy? Problems with babies? Hi, i write, bcz I am concern. I got a blood test and even though the result was negative, i got that i had this CMV virus non recently and I am pregnant, so i'm afraid my baby can get an
4 doctors weighed in across 2 answers
People also searched for:
I drank almost 2 liters of water before blood AFP test during pregnancy. I worry the results were lower because the water diluted my blood. Likely?
Can the AFP blood test to check abnormalities still be done at 21 weeks in pregnancy?
Can keriorrhea interfere with blood test results? My wife is Asian, 40 years of age. She had cholestatis last year during pregnancy, but it resolved after as it should. She recently got annual bloodwork done and GGT and others were high and she had k?
Yes i just had a HGC Quant blood test done and it was 0.6 was the result and IVE had a few digital Pregnancy test that were positive am I pregnant?
If a qualitative blood pregnancy test is done three weeks after a sexual encounter and done correctly can you trust the results if they are negative?
Didn't find what you're looking for?
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your questionMore of what we treat
Download HealthTap
Video visit and message your doctor
