[Effects of subchorionic hematoma on pregnancy outcome: a meta analysis].

OBJECTIVE: To study the effects of subchorionic hematoma (SCH) on pregnancy outcome. METHODS: We searched publications from January 2000 to July 2015 for cohort and case-control studies evaluating subchorionic hematoma and perinatal outcomes, including spontaneous abortion, premature delivery and delivery mode. RESULTS: Data of 6 articles analyzed by meta-analysis showed that SCH group had higher rate of spontaneous abortion, while no difference in premature delivery and delivery mode, compared with threatened abortion group. CONCLUSION: Subchorionic hematoma increases the risk of spontaneous abortion, while premature delivery rate and delivery mode are not affected if the pregnant women can continue the pregnancy.