Abstract
Hyperglycosylated human chorionic gonadotropin (H-hCG) is secreted by the placenta in early pregnancy. Decreased H-hCG levels have been associated with abortion in spontaneous pregnancy. We retrospectively measured H-hCG and dimeric hCG in the sera of 87 in vitro fertilization patients obtained in the 3 weeks following embryo transfer and set the results in relation to pregnancy outcome. H-hCG and dimeric hCG were correlated (r<sup>2</sup> = 0.89), and were significantly decreased in biochemical pregnancy (2 µg/l and 18 IU/l, respectively) compared to early pregnancy loss (22 µg/l and 331 IU/l) and ongoing pregnancy (32 µg/l and 353 IU/l). Only H-hCG tended to discriminate between these last two groups.
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