Congenital uterine anomalies: Frequencies of obstetric complications by CUA type

	Septate uterus^* Presented as OR, except as otherwise noted	Bicorporeal uterus^¶ Presented as OR, except as otherwise noted	Hemi-uterus^Δ Presented as OR, except as otherwise noted
Cesarean birth	5.19	7.82	2.06
Fetal growth restriction	2.99	3.86	4.43
Fetal malpresentation	13.76	10.41	11.6
Placental abruption	10.7	7.61	9.76
Pregnancy loss, first trimester	RR 2.65	RR 2.32 (bicornuate)
Pregnancy loss, second-trimester	RR 2.95	RR 2.9 (bicornuate)
Prelabor rupture of membranes	1.44	2.11	1.54
Preterm birth	4.06	4.98	3.74

CUAs are associated with an increase in obstetric complications. This table provides the types and frequencies of such complications, compared with those with normal uteri.

CUA: congenital uterine anomalies; OR: odds ratio; RR: relative risk.

* Includes complete septate or partial septate (subseptate) uteri.

¶ Includes bicornuate (partial or complete), bicornis-bicollis, and didelphys uteri.

Δ Includes unicornuate uterus.

Prepared with data from:

Panagiotopoulos M, Tseke P, Michala L. Obstetric Complications in Women With Congenital Uterine Anomalies According to the 2013 European Society of Human Reproduction and Embryology and the European Society for Gynaecological Endoscopy Classification: A Systematic Review and Meta-analysis. Obstet Gynecol 2022; 139:138.
Venetis CA, Papadopoulos SP, Campo R, et al. Clinical implications of congenital uterine anomalies: a meta-analysis of comparative studies. Reprod Biomed Online 2014; 29:665.

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Congenital uterine anomalies: Frequencies of obstetric complications by CUA type