Post-salpingectomy interstitial heterotopic pregnancy after in vitro fertilization and embryo transfer: A case report

Table 1 Characteristics of post-sterilization interstitial heterotopic pregnancy after in vitro fertilization and embryo transfer in our department

No.	Age, yr	Year	Gravida/Para	EP	History of sterilization	GA	Transferred embryos	Main symptom	Ultrasound manifestation	Ectopic site	Bleeding volume	Outcome of intrauterine pregnancy
1	29	2019	G4/P0030	1	Bilateral salpingectomy for HP in 2018	50 d	2 frozen embryos	Abdominal pain	IVE + ECM + PF	Left IP (ruptured)	700 mL	Full-term CS (selective)
2	32	2019	G4/P0030	2	Left salpingectomy for EP in 2013 and right salpingectomy for EP in 2015	66 d	2 fresh embryos	Abdominal pain	IVE + EVE	Left IP	300 mL	Premature CS at 34 wk (fetal distress)
3	36	2018	G4/P1021	1	Right salpingectomy and left tubal ligation for EP in 2015	38 d	2 frozen embryos	Abdominal pain	IVE + ECM + PF	Right IP (ruptured)	1000 mL	Full-term CS (breech position)
4	30	2016	G5/P0040	3	Left salpingectomy for EP in 2007 and right salpingectomy for EP in 2014	49 d	2 fresh embryos	None	IVE + EVE	Left IP	50 mL	Full-term CS (selective)

CS: Caesarean section; ECM: Extrauterine complex mass; EP: Ectopic pregnancy; EVE: Extrauterine viable embryo; GA: Gestational age; IP: Interstitial pregnancy; IVE: Intrauterine viable embryo; PF: Pelvic fluid.