Diagnosing early scar pregnancy in the lower uterine segment after cesarean section by intracavitary ultrasound

Table 3 Intracavitary ultrasound for diagnosing early scar pregnancy types

Types	Cases	Performance	Blood flow	Interval (cm)
Gestational sac	42	The gestational sac was located in the scar of the lower uterine segment	Abundant peripheral blood flow	2.42 ± 0.50
Heterogeneous mass	16	The heterogeneous mass was located in the lower part of the anterior wall of uterus, protruding into the bladder	Abundant internal and peripheral blood flow	1.79 ± 0.30
Part of the uterine cavity	5	The gestational sac was located in the lower part of the uterine cavity and part in the scar	Abundant internal and peripheral blood flow	2.29 ± 0.28