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  • Title: Outcomes of subchorionic hematoma-affected pregnancies in the infertile population.
    Author: Inman ER, Miranian DC, Stevenson MJ, Kobernik EK, Moravek MB, Schon SB.
    Journal: Int J Gynaecol Obstet; 2022 Dec; 159(3):743-750. PubMed ID: 35212401.
    Abstract:
    OBJECTIVE: To determine the implications of an incidentally noted subchorionic hematoma on pregnancy outcomes in the infertile population. METHODS: Retrospective cohort study at a tertiary care, university-based facility. All patients with intrauterine pregnancy on initial obstetric ultrasound presenting to an infertility clinic between January 2015 and March 2018 (n = 1210), regardless of treatment cycle, were included. Nonviable pregnancies were excluded. The main outcome measured was association between subchorionic hematoma and first trimester miscarriage. RESULTS: The prevalence of subchorionic hematoma was 12.5% (n = 151) and did not differ by type of fertility treatment. There was no association between subchorionic hematoma and first trimester miscarriage; however, among patients with subchorionic hematoma, those who reported both bleeding and cramping had an increased probability of miscarriage compared to those without symptoms (0.62 vs. 0.12, P <0.001). The live birth rate in this sample was 81.3% and there were no statistically significant differences in pregnancy outcomes between those with and without subchorionic hematoma. CONCLUSION: Among an infertile population, there was no increased risk of miscarriage when subchorionic hematoma was seen on early ultrasound; however, when patients noted both vaginal bleeding and cramping, their probability of miscarriage was significantly increased.
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