Uterine ectopic pregnancy

Cesarean scar pregnancy (CSP) is an abnormal implantation of the gestational sac in the area of the prior caesarean delivery (CD) scar, potentially leading to life-threatening complications, including severe haemorrhage, uterine rupture and development of placenta accreta spectrum (PAS) disorders.

A cervico-isthmic pregnancy is a rare condition defined by implantation of the gestational sac between the anatomical and histological internal os. Unlike true cervical pregnancies, it has the ability to develop beyond the second trimester.

Cervical ectopic pregnancy refers to an abnormal implantation of a fertilized ovum within the myometrium below the level of the internal os with a reported incidence of less than 1% of all ectopic pregnancies.

Intramural ectopic pregnancy refers to an abnormal implantation of a pregnancy within the myometrium. A gestational sac extending beyond the endometrial-myometrial junction is the defining feature. Intramural ectopic pregnancies should be subdivided into partial and complete. Ultrasound is the first-hand diagnostic tool.

Ovarian ectopic pregnancy (OEP) is a rare type of ectopic pregnancy in which the fertilized ovum implants into the ovary.

An ectopic pregnancy is defined as the presence of a pregnancy outside the uterine cavity, the commonest location being the fallopian tube. They account for 1-2% of pregnancies in the UK and may be as high as 4% with assisted conception.

Interstitial ectopic pregnancy is defined as the ectopic gestation implanting in the most proximal part of the fallopian tube.

An abdominal ectopic pregnancy ( AP) is a pregnancy that occurs in the abdominal cavity outside of the female reproductive organs.