Ishihara O

This study aimed to investigate assisted reproductive technology (ART) factors associated with placenta accreta spectrum (PAS) after vaginal delivery. This was a registry-based retrospective cohort study using the Japanese national ART regi…

BACKGROUND: This study aimed to determine the factors associated with an unfavorable clinical course (emergency surgery and/or prolonged hospitalization) in patients requiring hospitalization owing to pelvic inflammatory disease (PID). MET…

Surgical site infection (SSI) is a common but potentially serious maternal complication of cesarean section (CS). C-reactive protein (CRP) can be used in early detection of SSI. However, its predictive value for post-cesarean SSI has never …

Studies have consistently reported a significantly reduced incidence of ectopic pregnancy (EP) for frozen-thawed embryo transfer (ET) cycles compared with fresh cycles. However, only a few studies reported an association between endometrial…

MicroRNAs (miRNAs) are a class of small noncoding RNAs that regulate gene expression. They play fundamental roles in several biological processes, including cell differentiation and proliferation, embryo development, organ development, and …

PURPOSE: Subendometrial myometrium exerts wave-like activity throughout the menstrual cycle, and uterine peristalsis is markedly reduced during the implantation phase. We hypothesized that abnormal uterine peristalsis has an adverse effect …

BACKGROUND: Ovarian clear cell carcinoma (OCCC) is the second most common ovarian cancer after serous carcinoma in Japan. OCCC has a more unfavorable clinical outcome due to a poor response to platinum-based chemotherapy, compared with sero…

BACKGROUND: Children born after intracytoplasmic sperm injection (ICSI) are at increased risk of specific major birth defects compared with children born after in vitro fertilization (IVF). However, whether this risk is due to the treatment…

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 stimulat…

PURPOSE: High-mobility group N (HMGN) proteins are the only non-histone proteins that specifically bind within the nucleosome between core histones and DNA. Among them, HMGN5 is one of the candidates that could participate in mouse endometr…

AIM: The Japan Society of Obstetrics and Gynecology implemented a registry report system for the clinical practice of assisted reproductive technology in 1986. The aggregated results from 1992 to 2014 are reported herein. METHODS AND RESUL…

Endometrial decidualization represents an essential step for the successful implantation of the embryo; however, the molecular mechanism behind this differentiation process remains unclear. This study aimed to identify novel microRNAs (miRN…

AIM: Endometriosis is defined as the presence of endometrial glandular and stromal cells outside of the uterine cavity. A previous study reported that microRNA (miR)-542-3p plays a critical role in eutopic endometrial decidualization. This …

The present study aimed to measure the levels of coagulation factors in stored whole blood of pregnant women and to determine their usefulness in treating pregnant women who developed coagulopathy. A prospective study to measure coagulation…

Previous study indicated that bleeding into the peritoneum may accelerate inflammatory response in endometriosis-like grafts in mice. To identify changes in protein levels in the grafts from mice that underwent unilateral ovariectomy (uOVX)…

The Japan Society of Obstetrics and Gynecology Reproductive Endocrinology Committee summarizes the activities of each subcommittee below from April 2011 to March 2013. 1. Survey for clinical outcomes of infertility treatment for women with …

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 re…

The pathogenesis of endometriosis remains poorly understood at least in part because early stages of the disease process are difficult to investigate. Previous studies have proposed a three-dimensional fibrin matrix culture model to study h…

Tubal choriocarcinoma is an extremely rare condition and can be of gestational or non-gestational origin. The appropriate management of choriocarcinoma begins with the categorization of the tumor. However, it is difficult to discriminate th…