Korean J Obstet Gynecol.
2001 Apr;44(4):704-708.
Pregnancy Outcomes in Women with Unexplained Elevation of Maternal Serum Human Chorionic Gonadotropin Levels at Midtrimester
- Affiliations
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- 1Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
Abstract
OBJECTIVE
Our purpose was to determine the association between unexplained elevation of maternal serum human chorionic gonadotropin (hCG) in the second trimester and adverse pregnancy outcomes.
MATERIAL AND METHODS: Between February 1995 and July 1999, we evaluated 1566 pregnant women
who have underwent second trimester triple marker screening tests (alpha-fetoprotein, unconjugated estriol,
human chorionic gonadotropin) and delivered at Severance Hospital, Yonsei Medical Center. Multiple
pregnancies, abnormal fetal karyotypes, fetal anomalies, and abortions were excluded from the study. One
hundred twenty-one women with hCG levels greater than 2.0 multiples of the median (MoM) were included
in the study group while 1389 women with hCG levels less than 2.0 MoM served as the control group.
Pregnancy outcomes were obtained from the delivery and neonatal records in our institution. Adverse
pregnancy outcomes between the two groups were compared using chi-square test and Fisher's exact test.
RESULTS
Women with unexplained elevation of human chorionic gonadotropin levels were associated
with statistically significant increased risks for preeclampsia, preterm delivery, and low birth weight (p<0.05).
However, there were no significant differences between the study and control groups with respect to preterm
premature rupture of membranes, abnormal fetal heart rate tracing, abruptio placentae, intrauterine fetal death,
and neonatal death.
CONCLUSION
An unexplained elevation in human chorionic gonadotropin level in the second trimester
may increase the risk for preeclampsia, preterm delivery, and low birth weight but not for other adverse
pregnancy outcomes such as preterm premature rupture of membranes, abnormal fetal heart rate tracing,
intrauterine fetal death, or neonatal death.