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Dilation and Curettage (DC) may be performed with or without transabdominal ultrasound guidance. We aimed to evaluate the association between the use of ultrasound guidance during DC for first-trimester missed abortion (MA) and DC related complication rates.A retrospective cohort study including women in the age of 20-45 years, who underwent DC for first-trimester MA in a hospital-based setting between 2013-2019. The study population was divided into two groups - the study group which included women who underwent DC with ultrasound guidance (US group) and the control group, which included women who underwent DC without ultrasound guidance (N-US group). Gynecologic, obstetric and operative related data were collected from electronic medical records.Three-hundred and seventy-eight women were included in the study, 86 women in the US group and 292 women in N-US group. Baseline maternal characteristics and procedure-related characteristics did not differ between the groups. No significant difference between the US group and N-US group was shown when comparing DC related complications - retained products of conception rate (2.3% vs. 5.5%, respectively; p=0.385), uterine perforation rate (1.2% vs. 0.3%, respectively; p=0.404), and the total complication rate (8.1% vs. 12.3%, respectively; p=0.338). In a multivariate analysis, the use of ultrasound guidance during DC was not found to be associated with lower complication rate (adjusted Odds Ratio (aOR) 95% confidence interval (CI) 1.468 (0.578-3.729), p=0.419).Performance of DC under ultrasound guidance for first-trimester MA, in a hospital-based setting, was not associated with lower complication rate, suggesting that the common practice of performing DC without the use of ultrasound is an acceptable approach.

BACKGROUND Many variables, including woman's age, embryo quality and endometrial receptivity, influence the success rate of either fresh embryo transfer (ET) or frozen-thawed ET (FT-ET) cycles. This study aims to examine whether the results of a fresh in-vitro fertilization (IVF) cycle correlate with its frozen-thawed embryos transfer outcomes. METHODS A retrospective cohort study conducted in a tertiary medical center single IVF unit between 2014-2017. The study population was comprised of women who underwent fresh ET with the remaining embryos frozen using vitrification and at least one consecutive FT-ET cycle. Comparison of FT-ET cycle's details and outcomes were assessed in relation to the outcome of preceding fresh ET cycle. RESULTS A total of 599 women underwent fresh ET and at least one consecutive FT-ET cycle. Significantly higher rates of successful FT-ET cycle outcomes were observed in the group of patients with a successful fresh cycle compared to the group with an unsuccessful fresh cycle (48.9% vs. 20.8%, P