The part of the Fallopian tube that is located in the uterine wall and connects the remainder of the tube to the endometrial cavity is called its<unk> " part, hence the term<unk> "; it has a length of 1–2 cm and a width of 0.7 cm. Its borders are the opening (ostium) of the tube to the endometrial cavity within the uterus and, laterally, the visible narrow segment of the tube. The area is well supplied by the Sampson artery which is connected to both the uterine and the ovarian arteries. Surrounded by uterine muscle (myometrium) it can expand significantly when it hosts a pregnancy.<unk> es can be confused with angular pregnancies; the latter, however, are located within the endometrial cavity in the corner where the tube connects; typically those pregnancies are viable although a high rate of miscarriage has been reported. A pregnancy located next to the<unk>  section laterally is an isthmic tubal pregnancy. The definition of an ectopic pregnancy is a pregnancy outside the uterine cavity, not outside the uterus, as the<unk>  is still a uterine pregnancy.
Interstitial pregnancy
Cryptic pregnancy
Ovarian pregnancy
Molar pregnancy
Heterotopic pregnancy
Cervical pregnancy
Abdominal pregnancy
Invasive hydatidiform mole