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HCG Levels In Twin Pregnancy

positive pregnancy test and negative pregnancy test There are generally higher HCG levels in twin pregnancy, although they are not necessarily doubled as you might imagine. HCG (human chorionic gonadotropin) is a hormone produced during pregnancy that can be detected in the blood or urine even before the mother misses her period. This hormone doubles about every 2 days and is also what is detected in an over the counter pregnancy test.

You should keep in mind that there may also be higher levels in a singleton pregnancy due to other factors, for instance, an entopic pregnancy. There may also be lower levels in a twin pregnancy that is completely healthy. So, HCG levels in twin pregnancy are not always an accurate way to measure the health of the pregnancy.

According to our expert, Dr. Warshak:

"In general, HCG levels are higher for twin gestations, though definitely not doubled as one might expect. In addition, many singleton pregnancies have high levels for many other reasons. Therefore, there is no set rule about checking for twins based on HCG, but there really doesn't need to be, since these patients are being scanned for whatever their underlying concern is anyway."

So, if you're newly pregnant and are wondering if it's twins due to higher HCG levels, your OB will likely be doing some further examinations to confirm or deny this.

Below are some sample HCG levels in twin pregnancy for comparison. Discuss your own levels with your doctor or other healthcare provider for the most accurate information regarding your pregnancy.

Day After LH Or HCG
Average mIU/ml
High mIU/ml
Low mIU/ml
#
14 68 313 56 7
15 38 159 26 9
16 146 803 112 12
17 154 542 52 8
18 360 1760 200 9
19 499 2509 215 13
21 963 5859 631 10
The source of information in the table above is from a study done by
Dr. Richard Sherbahn and is for informational purposes only.



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