Ultrasound Research Today is a free monthly online journal that collates and summarizes the latest research about Ultrasound, including details on screening, diagnosis, pregnancy, detection. | ||||||||
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Role of saline infusion sonography in uterine evaluation before frozen embryo transfer cycle.Gera PS, Allemand MC, Tatpati LL, Galanits TM, Morbeck D, Coddington CC Division of Reproductive Endocrinology & Infertility, Department of Obstetrics & Gynecology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. OBJECTIVE: To determine the role of saline infusion sonography (SIS) in uterine evaluation before a frozen embryo transfer (FET) cycle. DESIGN: Retrospective cohort analysis. SETTING: University hospital. PATIENT(S): Thirty-six patients who had uterine evaluation by SIS before FET cycle. INTERVENTION(S): The SIS was performed in the follicular phase of the menstrual cycle before the actual FET cycle. MAIN OUTCOME MEASURE(S): The SIS findings, clinical pregnancy rate (PR), ongoing PR, and correlation between positive SIS findings with and without subsequent treatment and pregnancy outcome. RESULT(S): Positive SIS findings were found in 11/36 patients (30.5%), which included uterine septum (9.0%), endometrial polyp (45.4%), intramural fibroid with normal cavity (9.0%), cystic endometrial changes (9.0%), cervical stenosis (18.1%), and calcification with normal cavity (9.0%). The overall clinical PR in all groups was 51.4%, with an ongoing PR of 45.7%. Patients with positive SIS finding who underwent subsequent hysteroscopic correction (7/11) had a clinical PR of 85.7% as compared to 54.1% in patients with normal uterine cavity (24/35). Patients with positive SIS findings and no operative hysteroscopy (4/11) had a clinical PR of 50% and pregnancy loss rate of 100%. CONCLUSION(S): Obtaining an SIS before the FET cycle can be helpful in the detection of uterine abnormalities. If time since uterine evaluation has been more than 1-2 years, performing an SIS is recommended as subsequent correction of the anomalies may improve FET outcome. Published 11 March 2008 in Fertil Steril, 89(3): 562-6.
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