Bicornuate Uterus and Delivery

This study has a chart (Table 1) that states 25% of bicornuate pregnancies result in preterm deliveries, but it's a very small sample size of only 56, so perhaps not statistically significant.

This study also stated 25% result in preterm delivery, again with a small sample size, this time only 26. However, they also break down the weeks in which delivery occurred into two groups. Of the 14 deliveries, 3 occurred between 22-28 weeks and 11 occurred between 28-37 weeks. 46.4% of deliveries made it to term. The remaining pregnancies were "aborted," spontaneity not listed.

This study has a compilation of multiple other studies (Table VII). Overall, out of 627 pregnancies 23% delivered early, and 40.6% made it to term. If you look at only the delivery numbers (exclude abortions) 36% delivered early and 63% made it to term. Playing with the numbers also reveals a 13.2% still birth rate among the deliveries.