Abstract Adnexal torsion in advanced pregnancy is an uncommon emergency. It is uncommon for a normal-sized ovary to undergo torsion in advanced gestation. Presenting symptoms include severe abdominal pain, followed rapidly by maternal shock and fetal distress. A 34 years-old woman at 34 weeks gestation (gravida 5, para 4) was admitted with abdominal pain, vaginal bleeding, fever, and vomiting. On examination, in the right lower abdomen, an amorphous, predominantly hyperechogenic mass was found. Laparotomy revealed, however, that the right ovary was gangrenous and had undergone torsion. Adnexal torsion should be kept in mind in the differential diagnosis of lower abdominal pain in advanced gestation. An early diagnosis using Doppler ultrasonography of the adnexa will enable early intervention to prevent maternal shock and fetal distress. Keywords: Torsion, ovarian cyst, pregnancy Ozet Ileri gebelikte adneksal torsiyon nadir bir acil durumdur. Buyuk gebeliklerde normal bir overind torsiyona ugramasi zordur. Olgu siddetli karin agrisi ve bunu izleyen hizli maternal sok ve fetal distress ile basvurdu. Anne, 34 yasinda, gravida 5 parite 4, karin agrisi, vajinal kanama, ates ve kusma ile Kabul edildi. Muayenede sag alt kadranda duzensiz sekilli, daha cok hiperekojenik olan bir kitle bulundu. Laparatomide sag overin torsiyona ugramis ve gangranoz oldugu saptandi. Ileri gebelikte alt karin agrilarinin ayirici tanisinda adneksal torsiyon da dusunulmelidir. Adnekslerin Doppler ultrasonografisi erken tanida yardimci olarak maternal sok ve fetal distresi onleyebilir. Anahtar sozcukler: Torsiyon , over kisti, gebelik