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( Hyun Sik Youm ),( Hyun Sik Youm ),( Jong-ryeol Choi ),( Daesik Oh ),( Young Ho Rho ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
목적: To evaluate whether ectopic pregnancy rates differ between natural and hormone replacement endometrial preparation in frozen embryo transfer. 방법: Meta-analysis was performed on the 3 selected studies in the statistical framework R using ‘meta’ package (random effects model: DerSimonian-Laird estimator). The outcome considered in this study was the ectopic pregnancy rates. 결과: The ectopic pregnancy rates were not different between natural and hormone replacement endometrial preparation in frozen embryo transfer (odds ratio [OR] 0.91, 95% confidence interval [CI] 0.40-2.06). 결론: The data presented in this meta-analysis do not support a different risk in ectopic pregnancy between natural and hormone replacement endometrial preparation in frozen embryo transfer.
Intrauterine injection of human chorionic gonadotropin before embryo transfer: A meta-analysis
( Hyun Sik Youm ),( Jong-ryeol Choi ),( Daesik Oh ),( Young Ho Rho ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
목적: To evaluate the effect of human chorionic gonadotropin (hCG) before embryo transfer on the outcome of in vitro fertilization. 방법: Meta-analysis was performed on the 6 selected studies in the statistical framework R using ‘meta’ package (random effects model: DerSimonian-Laird estimator). Subgroup analysis related to developmental stage was conducted. The outcome considered in this study was the rates of clinical pregnancy. 결과: The rates of clinical pregnancy were higher in ‘hCG’ group compared to ‘Control’ group (odds ratio [OR] 1.62, 95% confidence interval [CI] 0.10-2.39) in cleavage stage embryo tansfer. However, the rates of clinical pregnancy were not different between ‘hCG’ group and ‘control’ group (OR 1.01, 95% CI 0.66-1.54) in blastocyst embryo transfer. 결론: Intrauterine injection of human chorionic gonadotropin before embryo transfer is efficient in the aspect of clinical pregnancy when it is performed in clevage stage embryo transfer.
Closed vitrification of mouse cleavage stage embryos using electron microscopy (EM) grid
( Hyun Sik Youm ),( Ja Seong Koo ),( Sung Eun Moon ),( Bo Sun Joo ),( Hwa Sook Moon ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
The potential risk of viral and microbial contamination that exists with open cryopreservation systems can be avoided with a closed system. We compare the efficiency of mouse cleavage stage embryos vitrification in closed versus open conditions, and examine the possibility of aseptic vitrification using EM grid in cryovial storage system. Four-cell and eight-cell mouse embryos were exposed to base medium consisting of DPBS supplemented with 10 mg/mL of BSA, 7.5% ethylene glycol (EG), and 7.5% dimethyl sulfoxide (DMSO) for 2 minutes. The embryos were transferred to a vitrification solution consisting of base medium, 15.0% EG, 15.0% DMSO, 10 mg/mL ficoll, and 0.65 mol/L sucrose for less than 30 seconds before being placed on the EM grid. The EM grid was then either plunged into a 1.0 mL cryovial filled with liquid nitrogen (Group 1; open system) or placed into a 1.0 mL cryovial that kept in liquid nitrogen for 24 hours to super-cool the air inside the cryovial (Group 2; closed system). Vitrified embryos were warmed in sequential sucrose solutions (1.0, 0.5, 0.25, and 0.125 mol/L in base medium). Survival, blastocyst development, and hatching rates of warmed embryos were assessed. Survival, blastocyst development, and hatching rates were not significantly different between two groups (Four-cell: 90.6% (58/64), 37.9% (22/58), 20.7% (12/58) in group 1 and 81.5% (44/54), 31.8% (14/44), 22.7% (10/44) in group 2 (p>0.05, respectively); Eight-cell: 63.6% (42/66), 71.4% (30/42), 57.1% (24/42) in group 1 and 72.0% (54/72), 88.9% (48/54), 44.4% (24/54) in group 2 (p>0.05, respectively)). This study shows that closed vitrification can provide an aseptic alternative to open vitrification, and the possibility of aseptic vitrification using EM grid in cryovial storage system is confirmed.
( Hyun Sik Youm ),( Ja Seong Koo ),( Sung Eun Moon ),( Hwa Sook Moon ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-
목적: To summarize the available evidence from studies comparing closed versus open vitrification for cryopreservation of human oocyte and embryo. 방법: Meta-analysis was performed on the 14 selected studies in the statistical framework R using ‘meta’ and ‘metafor’ (random effects model: DerSimonian-Laird estimator). Overall, this study summarized information from 4814 vitrified human oocytes and embryos (closed vitrification: n = 2289, open vitrification: n = 2525). Subgroup analysis related to stage, study design, and publication type was conducted. The outcomes considered in this study were the rates of survival, implantation, clinical pregnancy, and live birth. 결과: The rates of survival, implantation, clinical pregnancy, and live birth did not different between closed and open vitrification (survival: odds ration [OR] 0.70, 95% confidence interval [CI] 0.48-1.04; implantation: OR 1.00, 95% CI 0.81-1.25; clinical pregnancy: OR 0.87, 95% CI 0.65-1.17; live birth: OR 0.83, 95% CI 0.62-1.12). 결론: This study shows that open vitrification may be replaced by closed vitrification without affecting clinical efficiency. Therefore, closed vitrification provides an aseptic alternative to open vitrification for cryopreservation of human oocyte and embryo.
( Hyun Sik Youm ),( Sung Eun Moon ),( Jeong Hwan Hyeun ),( Hyun Jung Kim ),( Kyung Seo Kim ),( Soo Hyun Lim ),( Jin Kuk Choi ),( Ja Sung Koo ),( Hwal Woong Kim ),( Hwa Sook Moon ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.98 No.-
Lobular endocervical glandular hyperplasia (LEGH) is a benign lesion characterized by non-invasive proliferation of endocervical glandular cells. Adenoma malignum, known as minimal deviation adenocarcinoma of the uterine cervix is an extremely well-differentiated mucinous adenocarcinoma. The objective of this study was to look for the characteristic findings in LEGH and the major consideration in the differential diagnosis with adenoma malignum. We carried out a retrospective analysis of cases treated at our hospital from 2002 to 2012. All cases of LEGH and adenama malignum presented profuse watery vaginal discharge, and transvaginal ultrasonography and MRI findings showed multicystic lesion. Pap smear was usually normal and conization was the main diagnostic method, however conization was not appropriate in cases of deep and highly located lesion. In these cases, we performed laparoscopic excisional biopsy or hysteroscopic biopsy with frozen section for differential diagnosis of adenoma malignum from LEGH. LEGH, LEGH with adenocarcinoma in situ, and adenoma malignum present similar clinical findings. Due to apparent difference in the treatment, an accurate preoperative differential diagnosis is necessary. Conization is the diagnostic method of choice. But, in cases of deep and highly located lesion or where conization could not include the exact lesion, further evaluation such as laparoscopic excisional biopsy or hysteroscopic biopsy with frozen section instead of conization only shoule be considered.
Open versus closed vitrification for cryopreservation of human oocyte and embryo; A meta-analysis
( Hyun Sik Youm ),( Ja Seong Koo ),( Sung Eun Moon ),( Bo Sun Joo ),( Hwa Sook Moon ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
To summarize the available evidence from studies comparing open versus closed vitrification for cryopreservation of human oocyte and embryo. Meta-analysis was performed on the 13 selected studies in the statistical framework R using meta package (fixed effect model: inverse variance method, random effects model: DerSimonian-Laird estimator). Overall, this study summarized information from 4460 vitrified human oocytes and embryos (open vitrification: n = 2431, closed vitrification: n = 2029). Subgroup analysis (mature oocyte, cleavage stage embryo, and blastocyst embryo) was conducted. The outcomes considered in this study were the rates of survival, implantation, clinical pregnancy, and live birth. The rates of survival, implantation, clinical pregnancy, and live birth did not different between open and closed vitrification (survival: relative risk [RR] 0.98, 95% confidence interval [CI] 0.97-1.00 in fixed effect model [FEM], RR 0.97, 95% CI 0.92-1.01 in random effects model [REM]; implantation: RR 1.05, 95% CI 0.92-1.19 in FEM, RR 1.05, 95% CI 0.90-1.23 in REM; clinical pregnancy: RR 1.01, 95% CI 0.88-1.14 in FEM, RR 1.01, 95% CI 0.85-1.20 in REM; live birth: RR 0.94, 95% CI 0.81-1.09 in FEM, RR 0.92, 95% CI 0.74-1.14 in REM; similar results in each subgroup). This study shows that open vitrification may be replaced by closed vitrification without affecting clinical efficiency. Therefore, closed vitrification provides an aseptic alternative to open vitrification for cryopreservation of human oocyte and embryo.
FSH priming in in vitro maturation (IVM): A meta-analysis of randomized controlled trials
( Hyun Sik Youm ),( Jong-ryeol Choi ),( Daesik Oh ),( Young Ho Rho ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
목적: To evaluate the impact of FSH priming in IVM 방법: Meta-analysis was performed on the 4 selected studies in the statistical framework R using ‘meta’ package (fixed effect model: Inverse variance method). Subgroup analysis related to patient characteristic (‘PCOS’ and ‘Regular cycles’) was conducted. The outcome considered in this study was the rates of clinical pregnancy. 결과: The rates of clinical pregnancy were not different between ‘FSH priming’ group and ‘No priming’ group (overall: risk difference [RD] 0.04, 95% confidence interval [CI] -0.04-0.12; ‘PCOS’: RD 0.13, 95% CI -0.04-0.30; ‘Regular cycles’: RD 0.01, 95% CI -0.07-0.10). 결론: FSH priming shows no significant effect on clinical outcome.