Table 1.

Ultrasound findings and subsequent diagnosis

Ultrasound finding at baseline	Women (n)	Final diagnosis	Treatment
Empty uterus only	10	Ectopic=6 PUL=4	Salpingectomy=6 Methotrexate=3 Conservative=1
Empty uterus and adnexal lesion	13	Ectopic=10 PUL=3	Salpingectomy=10 Methotrexate=1 Conservative=2
Fluid-filled intrauterine area	3	Ectopic=1 PUL=2	Salpingectomy=1 Methotrexate=2
Intrauterine sac without decidual reaction	1	C-scar ectopic=1*	Methotrexate=1
Intrauterine sac with decidual reaction	2	Heterotopic=1* Ectopic=1*	Salpingectomy=2

*Initially considered and managed as an intrauterine pregnancy.

C, caesarean; PUL, pregnancy of unknown location.