Pinned 0 times. Top Pages

hCG Levels and Twins

    Keyword Tags: 

    Could it be twins?

    Q: I am 18 DPO and my serum hCG is 556. Could this mean I have twins?

    A: A serum hCG of 556 mIU/mL at 18 DPO is normal both for one or two fetuses. You could have twins, but you can't really tell from the serum hCG value alone. At 18 DPO the serum hCG for singletons is normally between about 70 and 750 mIU/mL, and for twins it can be between 200 and about 1750 mIU/ml.

    Twins When HCG Increasing Too Fast

    In most pregnancies, the normal hCG rises is at least 60% over 48 hours. In twins it may rise much more, but it's not possible to diagnose a twin pregnancy just from the hCG levels alone.

    There is no sufficient scientific evidence that with twins there is always a faster-than-usual rise in hCG. Normal hCG values can vary up to 20 times in normal pregnancies. Variations in hCG increases are not necessarily a sign that the pregnancy is abnormal or that there are two or more fetuses. 

      NORMAL TWIN PREGNANCIES NORMAL SINGLE PREGNANCIES
    Day after LH or HCG Average High Low Average High Low
    mIU/ml mIU/ml mIU/ml mIU/ml mIU/ml mIU/ml
    14 68 313 56 48 119 17
    15 88 159 26 59 147 17
    16 146 803 112 95 223 33
    17 154 542 52 132 429 17
    18 360 1760 200 292 758 70
    19 499 2509 215 303 514 111
            522 1690 135
    21 963 5859 631 1061 4130 324

    < hcG Levels and hCG Level Chart by Week

    Keyword Tags: