# Spontaneous Haemoperitoneum in the Third Trimester of Pregnancy Due to Adenomyosis: A Case Report

## TL;DR

A rare case of internal bleeding during late pregnancy caused by adenomyosis is reported.

## Contribution

This case report highlights adenomyosis as a potential cause of spontaneous haemoperitoneum in the third trimester.

## Key findings

- Adenomyosis can lead to spontaneous haemoperitoneum in late pregnancy.
- Bleeding from endometrial foci due to ruptured adenomyosis was observed in a pregnant patient.

## Abstract

Spontaneous haemoperitoneum in pregnancy (SHiP) is a rare condition that can seriously endanger the life of both the mother and child. It can occur at any time during pregnancy but is most common in the last trimester. The etiology of SHiP is unknown. Endometriosis is one of the main risk factors for spontaneous haemoperitoneum due to the rupture of the utero-ovarian vasculature or bleeding from endometrial foci in the abdomen, but so is adenomyosis. We present an infrequent clinical case of a patient with uterine adenomyosis rupture and bleeding from endometrial foci in the third trimester of pregnancy.