Study of uterine kinetics in nonpregnant women using cine-mode magnetic resonance imaging.

Purpose: To evaluate the uterine kinetics in each phase of the menstrual cycle when observed in detail using cine-mode magnetic resonance imaging (MRI) of sagittal and transverse plane images.

Methods: Seven volunteers with a history of multiple natural pregnancies and deliveries were enrolled from January 2017 to May 2017. The kinetic parameters (depth, frequency, and direction) of uterine muscle contractions were evaluated in cine-mode MRI.

Neonatal outcomes following different ovarian stimulation protocols in fresh single embryo transfer.

Previous studies suggested ovarian stimulation was associated with lower birth weight and higher risk of preterm delivery (PTD) from fresh embryo transfers (ETs). However, whether the increased risk differs between distinct ovarian stimulation protocols remains unknown. A retrospective cohort study of 38,220 singleton deliveries after fresh single ETs from 2007 to 2013 was conducted.

Extrauterine Choriocarcinoma in the Fallopian Tube Following Infertility Treatment: Implications for the Management of Early-Detected Ectopic Pregnancies.

Extrauterine choriocarcinoma in the fallopian tube is very rare and is often diagnosed and treated as an ectopic tubal pregnancy. A 34-year-old woman who initially became pregnant after infertility treatment using ovulation induction with clomiphene citrate and intrauterine insemination was later diagnosed with an extrauterine choriocarcinoma in the left fallopian tube. Because of suspected left ectopic tubal pregnancy based on ultrasonography findings and a high level of β-human chorionic gonadotropin (β-hCG; 7054.

Impact of single embryo transfer policy on perinatal outcomes in fresh and frozen cycles-analysis of the Japanese Assisted Reproduction Technology registry between 2007 and 2012.

Objective: To investigate whether the introduction of single embryo transfer (SET) policy in Japan has improved perinatal outcomes.

Design: A retrospective cohort study.

Setting: Not applicable.

Validity for assisted hatching on pregnancy rate in assisted reproductive technology: analysis based on results of Japan Assisted Reproductive Technology Registry System 2010.

Aim: The aim of this study was to assess the efficacy of assisted hatching (AH) in assisted reproductive technology (ART) treatment.

Material And Methods: In this retrospective observational study, the data of patients who were registered in the National ART Registry System of Japan between January and December 2010 were analyzed. The descriptive statistics and validity of AH in fresh embryo transfer (ET) and frozen-thawed ET were assessed by using multiple logistic regression analyses.

The incidence of monozygotic twinning in assisted reproductive technology: analysis based on results from the 2010 Japanese ART national registry.

Purpose: To assess the incidence of monozygotic twinning (MZT) among cases undergoing assisted reproductive technology (ART) treatment.

Methods: We performed a retrospective observational study and analyzed the data of patients who were registered in the national ART registry system of Japan from January to December 2010; only the data of patients with single embryo transfer (ET) were included.

Results: Of 30,405 pregnancies, 425 resulted in MZT following fresh and frozenthawed ET.

Efficacy, safety, and trends in assisted reproductive technology in Japan-analysis of four-year data from the national registry system.

Purpose: This study aimed to evaluate the efficacy, safety, and trends in assisted reproductive technology (ART) in Japan.

Methods: Data pertaining to treatment cycles, pregnancy rate, live birth rate, age distribution, single embryo transfer rate, and multiple pregnancy rate were analyzed for patients registered in the national ART registry system of Japan from 2007 to 2010.

Results: The total number of treatment cycles was 161,164, 190,613, 213,800, and 242,161 in 2007, 2008, 2009, and 2010, respectively.

Implications of assisted reproductive technologies on term singleton birth weight: an analysis of 25,777 children in the national assisted reproduction registry of Japan.

Objective: To evaluate the implications of assisted reproductive technologies (ART) on neonatal birth weight.

Design: A retrospective study using analysis of covariance and multiple logistic regression analysis of the Japanese ART registry.

Setting: Japanese institutions providing ART treatment.