Annex torsion is a true surgical emergency, it is a rare pathology, secondary to the total or partial rotation of the appendix around its vascular axis, which can lead to hemorrhagic necrosis of the ovary. Its frequency is estimated at 1/5 000 pregnancies. It can occur during the entire pregnancy, although the increase in the size of the uterus in the 2nd-3rd trimester reduces the mobility of the appendix. Its clinical signs are usually acute and sudden pain, nausea and vomiting secondary to peritoneal irritation and the existence of an adnexal mass. Ultrasound is the paraclinical reference examination, it allows to visualize an annexial pathology that can be at the origin of the torsion and look for the indirect signs of ischemia. The treatment of appendix torsions during pregnancy can be done by laparoscopy, while respecting the safety instructions in relation to the pregnant uterus, laparotomy remains the most evaluated surgical technique. The treatment must be conservative if the recovery of the appendage after untwisting allows it. Only an ipsilateral recurrence can make discuss prevention by an annexed pexy