1Martin JN Jr, Sessums JK, Martin RW, Pryor JA, Morrison JC (1998) Abdominal pregnancy: current concepts of management. Obstet Gynecol 71: 549-557.

2Strafford JC, Ragan WD (1997) Abdominal pregnancy: review of current management. Obstet Gynecol 50: 548-552.

3Studdiford WE (1942) Primary peritoneal pregnancy. Am J Obstet Gynecol 44: 487–91.

4 Hallat JG, Grove JA (1985) Abdominal pregnancy: a study of twenty-one consecutive cases. Am J Obstet Gynecol 152: 444-449.

5Stovall TG (2002) Early pregnancy loss and ectopic pregnancy. In Berek JS (eds) Novak's Gynaecology. Lippincott Williams & Wilkins, Philadelphia.

6Wu MC, Huang WC, lin HH, Sm Hsiao (2011) Severe intra-abdominal bleeding from neglected omental implantation of ectopic tissue after methotrexate treatment for persistent ectopic pregnancy. Fertility Sterility 95: 2435e1-2435e3.

7Martelli F, De Carolis C, Parisi C, Piccione E (2013) Neglected primary omental pregnancy after laparoscopic and medical treatment: a difficult diagnosis? Case Rep Obstet Gynecol 2013: 207307.

8Wong WC, Wong PY, Kun KY, Ng TK, Kwok SY, et al. (2004) Primary omental ectopic pregnancy. J Obstet Gynecol Res 30: 226-229.

9Ozdemir I, Demirci F, Yucel O, Alper M, et al. (2003) Primary omental pregnancy presenting with hemorrhagic shock. A case report. Gynecol Obstet Invest 55: 116-118.

10Onan MA, Turp AB, Saltik A, Akyurek N, Taskiran C, et al. (2005) Primary omental pregnancy: case report. Hum Reprod 20:807-809.

11Esin S, Yildirim H, Tanzer F (2009) Laparoscopic management of a primary omental pregnancy after clomiphene induction. Fertil Steril 92: 392e1-392e3.