Irahara M

PurposeThe purpose of this study is to compare anthropometric measurements between term singletons conceived via fresh embryo transfer (FreET) and frozen embryo transfer (FET) and those born via natural conception (NC) or fertility treatmen…

PurposeWe evaluated whether preimplantation genetic testing for aneuploidy (PGT-A) could increase the cumulative live birth rate (CLBR) in patients with recurrent implantation failure (RIF) and recurrent pregnancy loss (RPL).MethodsThe clin…

Endometriosis is a condition in which tissue similar to the womb lining begins to grow in other sites, such as the ovaries or fallopian tubes. Endometriosis can cause pelvic pain, adhesion formation, and infertility. Here, we investigated t…

This study aimed to evaluate the attitudes of male and female members of the public toward uterus transplantation (UTx), surrogacy, and adoption in Japan via a web-based survey. One thousand six hundred participants were recruited with equa…

PURPOSE : This study aimed to investigate the effect of intraperitoneal administration of activin on the occurrence of endometriosis using a mouse model of endometriosis. METHODS : A mouse model of endometriosis was prepared by intraperiton…

PURPOSE: The aims of this study were to clarify the effects of lipopolysaccharide (LPS) on the early development of endometriosis and on the production of cytokines and chemokines in the murine peritoneal cavity. METHODS: Endometriotic lesi…

BackgroundChildren 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 i…

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…

PurposeTo compare the ovarian response predictive ability of anti-Müllerian hormone (AMH), follicle-stimulating hormone (FSH), and estradiol (E2) and to determine the age-specific distribution of serum AMH concentrations of Japanese women.M…

AimThe 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 resultsTh…

PurposeWe evaluated the role of tumor necrosis factor alpha (TNFα) in rat ovulation and granulosa cell death of ovarian follicles during the periovulatory stage.MethodsImmature rats primed with pregnant mare serum gonadotropin were injected…

Endometriosis is a chronic gynaecological disorder that is accompanied by inflammation and oxidative stress. Atherosclerosis has a long subclinical progression in arteries of children and young adults decades before overt clinical manifesta…

PurposeTo assess the incidence of monozygotic twinning (MZT) among cases undergoing assisted reproductive technology (ART) treatment.MethodsWe performed a retrospective observational study and analyzed the data of patients who were register…

PurposeWe aimed to compare the efficacy and safety of recombinant human follicle-stimulating hormone (follitropin alfa) and purified urinary human follicle-stimulating hormone (urofollitropin) for ovulation induction in Japanese women with …

PURPOSE: The aim of this study was to clarify the role of blood in the early stage of development of endometriotic lesions by developing a syngeneic transplantation model using immunocompetent mice. METHODS: Endometriotic lesions were induc…

Progestogen is a very important steroid hormone which has roles of supporting pregnancy secreted from ovary and placenta. From 1930, a lot of progestogens are compounded for clinical use. Compounded progestogens have not only progesterone e…

Aim:  Dienogest, a novel progestational 19-norsteroid, has been shown to have a therapeutic effect on endometriosis with its major side-effect being irregular genital bleeding. This study aimed to investigate the mechanism responsible for t…

AIM: To clarify the effect of laparoscopic cystectomy for ovarian endometrioma in infertility patients, the pregnancy outcome was evaluated. METHODS: This was a retrospective study. From August 2002 to February 2006, 33 infertility patients…

Aim:  The aim of the present study was to establish a standard protocol for ovarian stimulation with gonadotropin-releasing hormone analog (GnRH-a) long protocol using recombinant-follicle stimulating hormone (rec-FSH) preparations for assi…

PurposeIntraovarian arterial blood flows before and after follicular rupture in ovulation induced cycles were examined by transvaginal color flow Doppler imaging. The changes observed in the intraovarian arterial resistance before and after…

PurposeTo demonstrate our hypothesis that a correlation exists between oocyte maturity and a decrease in intraovarian blood flow resistance in assisted reproductive technology (ART) treatment cycles, oocyte maturity and total antioxidant st…

PurposeColor Doppler imaging permits the accurate localization of vessels and high-frequency pulsed Doppler ultrasonography has improved the resolution of flow velocity waveforms. In this study, intraovarian arterial blood flow before and a…

A novel cytokine termed osteoprotegerin (OPG) that is also called osteoclastogenesis-inhibitory factor, which inhibits osteoclast maturation and activity, was recently isolated. In order to determine the influence of estrogen deficiency on …

We performed a randomized controlled study to determine the efficacy of add-backed therapy by every-other-day administration of 0.625 mg conjugated equine estrogen (CEE) and 2.5 mg medroxyprogesterone acetate (MPA) on GnRH agonists (GnRH-a)…

To determine the influence of estrogen on the activity of renal proximal tubular reabsorption of inorganic phosphate (Pi) in women, we examined the changes of the renal threshold phosphate concentration (also denoted as TmP/GFR), as well as…