The body is the main, upper two-thirds of the uterus, between the fundus and the narrow isthmus. It encloses the triangular uterine cavity, flattened from front to back. Its thick myometrium and lining are where the embryo implants and the pregnancy grows.
| Location | Central and upper part of the uterus, between the fundus and isthmus |
|---|---|
| Parts |
|
| Nerve Supply | Uterovaginal plexus (from the inferior hypogastric plexus); Sympathetic fibres T10-L1 (pain from the uterine body); Pelvic splanchnic nerves S2-S4 (parasympathetic, pain from the cervix) |
| Blood Supply | Uterine artery; Ovarian artery (anastomosing branches) |
| Venous drainage |
|
| Lymphatic drainage |
|
Provides the site of implantation and the main expanding chamber for the pregnancy.
Most implantation and most fibroids occur in the body. Endometrial biopsy and hysteroscopy sample and view its lining when bleeding is abnormal. The lower part of the body and isthmus thin out in late pregnancy to form the lower uterine segment, the usual site of the caesarean incision.
Endometrial tissue growing into the muscle of the uterine body, causing a bulky, tender uterus, painful and heavy periods.
A benign overgrowth of lining projecting into the cavity, causing irregular bleeding.
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