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Korean Journal of Obstetrics & Gynecology 2008;51(6):634-641.
Published online June 1, 2008.
Clinical manifestations and risk factors of severe ovarian hyperstimulation syndrome by IVF-ET.
Hyun Ha Seok, Hyung Jae Won, Tae Ki Yoon, Woo Sik Lee, In Pyung Kawk, Jung Hyun Cho, Ji Eun Han, Soo Hee Kim, You Shin Kim, Sang Woo You
Fertility Center of CHA General Hospital, Pocheon CHA University, Department of Obstetrics and Gynecology, College of Medicine, Seoul, Korea. obdoc1970@naver.com
Abstract
OBJECTIVE
The aim of this study is to determine the incidence, clinical predictors, clinical manifestations of severe ovarian hyperstimulation syndrome in a large group. METHODS: A retrospective analysis of all IVF-ET cycles was performed from January 2005 to October 2007. We analysed incidence of severe OHSS and clinical manifestation. We assessed transvaginal number of follicles on hCG, serum estradiol, numbers of oocytes as the predictive factors comparing severe OHSS group and control group. Chi-square test and Student's t-test were used. Pleural effusion group was assessed identically. RESULTS: 6,292 IVF-ET cycles were undertaken in which 133 cycles of severe OHSS was developed (incidence: 2.11%). Patients age, transvaginal number of follicles on hCG, serum estradiol, numbers of oocytes were high in severe OHSS group and lately developed OHSS patients were all pregnant. 43.6% of severe OHSS were diagnosed polycystic ovarian syndrome. Pleural effusion was develop in 28 patients (incidence : 0.45%) and there were no predictive factor of pleural efusion. CONCLUSIONS: The incidence of severe OHSS was 2.11%. The protocol of controlled ovarian hyperstimulation did not affect the incidence of severe OHSS. Transvaginal number of follicles on hCG, serum estradiol, numbers of oocytes, PCOS, pregnancy were meaningful risk factors. There were no predicting factor for the pleural effusion of severe OHSS.
Key Words: OHSS, Incidence, IVF, Risk factor


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