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Subchorionic hematoma occurs more frequently in in vitro fertilization pregnancy

      Abstract

      Objective

      Obstetric complications occur more frequently in pregnancies after in vitro fertilization (IVF). We attempted to determine the correlation between subchorionic hematoma and IVF pregnancies.

      Study design

      We analyzed 194 pregnancies achieved by infertility treatment between January 2008 and February 2012 at our hospital. Among these, 67 were achieved by IVF and 127 by non-IVF approaches. We compared the frequency of subchorionic hematoma between the groups and examined the risk factors for subchorionic hematoma in the IVF group.

      Results

      No significant differences regarding age and the number of uterine surgery were observed between the groups. The duration of infertility was longer, parity and the rate of luteal support were higher in the IVF group compared with that in the non-IVF group. The frequency of subchorionic hematoma was significantly higher in the IVF group (22.4%) than that in the non-IVF group (11%) (P = 0.035). Univariate analysis in the IVF group demonstrated that frozen–thawed embryo transfer (OR, 6.18; 95% CI, 1.7–22.4), parity ≥ 1 (OR, 3.67; 95% CI, 1.0–13.2) and blastocyst transfer (OR, 3.75; 95% CI, 1.1–13.3) were risk factors for the subchorionic hematoma.

      Conclusion

      The frequency of subchorionic hematoma is high in IVF pregnancies, and frozen–thawed embryo transfer, parity ≥ 1, and blastocyst transfer may contribute to subchorionic hematoma onset.

      Keywords

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