Hiroaki Shibahara

BACKGROUND: Uterine endometrial natural killer (uNK) cells represent major leukocytes in the mid-secretory phase of the cell cycle, and their number is further increased during early pregnancy. The activating and inhibitory receptors expres…

Ovarian endometrioma is an ovarian cyst formed when endometrial tissue grows on the surface of the ovaries, often leading to chronic abdominal pain and fertility problems. This study evaluated the technique and efficacy of transvaginal etha…

STUDY QUESTION: Is oocyte developmental competence associated with changes in granulosa cell (GC) metabolism? SUMMARY ANSWER: GC metabolism is regulated by the LH surge, altered by obesity and reproductive aging, and, in women, specific me…

OBJECTIVES: The objective of this study was to investigate the safety and utility of hybrid uterine septal resection. MATERIALS AND METHODS: This retrospective cohort trial included 16 patients who underwent hybrid uterine septal resection…

AIM: This study aimed to clarify the impact of coronavirus disease 2019 on gynecology practice in Japan, in particular, on surgeries for benign gynecological diseases. METHODS: An online questionnaire was distributed to 966 facilities in J…

The detailed mechanism underlying endometriosis development remains unclear; few reports have suggested the involvement of immune and genetic factors. This study aims to investigate the role of NK cells in endometriosis by analyzing the co-…

PURPOSE: Our aim is to make an ideal embryo culture medium close to human oviduct fluid (HOF) components, and to evaluate the quality of this medium with embryo quality and clinical outcomes in assisted reproductive technology (ART) by a pr…

PURPOSE: Laevo (l)-carnitine plays important roles in reducing the cytotoxic effects of free fatty acids by forming acyl-carnitine and promoting beta-oxidation, leading to alleviation of cell damage. Recently, the mitochondrial functions in…

PURPOSE: The fertility of women decreases with age because of factors such as an increased incidence of aneuploidies and-possibly-decreased mitochondrial activity in oocytes. However, the relationship between maternal aging and mitochondria…

Endometriosis is a chronic disease that commonly affects women in their reproductive age. It has been reported that the infertility due to endometriosis is largely caused by pelvic adhesion, oocyte damage, and so on. There are several cause…

AIM: To reveal current problems and challenges faced by our gynecologic services department in managing patients with hereditary cancers. METHODS: We collected clinical data of patients with hereditary cancers, identified via genetic testi…

Endometriosis is an estrogen-dependent disease with symptoms of dysmenorrhea, chronic pain, and infertility that affects 6-10% of women of reproductive age. Medical or surgical therapy, such as administration of an anti-gonadotropin or ovar…

Only a few cases of premenarcheal endometriosis have been reported in the literature, and bladder endometriosis accounts for 1% of all cases of endometriosis. The authors report the case of an 11-year-old girl who presented with macrohematu…

PURPOSE: The oxygen consumption rates (OCRs) in mice and cattle have been reported to change during preimplantation embryogenesis. On the other hand, mitochondrial DNA (mtDNA) copy number has been shown to be unchanged in mice and changed i…

PURPOSE: The aim of this study was to establish a simple tool to predict good-quality embryos in in vitro fertilization (IVF) by using cumulus cells (CCs) or peripheral blood cells (PBCs). METHODS: Mitochondrial DNA was extracted from CCs …

•Endometrial stromal sarcoma disseminated after morcellation•Complete remission of pelvic recurrence was achieved by oophorectomy.•Laparoscopic confirmation of remission of recurrent disease.

OBJECTIVE: To investigate the localization of the proteins osteopontin (OPN) and L-selectin (SELL). DESIGN: Retrospective nonrandomized immunohistochemical study in a surgically induced rat model of peritoneal endometriosis and in samples …

AIM: Transvaginal hydrolaparoscopy (THL) has recently been developed as a less invasive alternative to conventional laparoscopy. There are some reports that described the usefulness and prognostic value of diagnostic THL in infertile women.…

Although laparoscopic adenomyomectomy may be a possible risk factor for uterine rupture in subsequent pregnancy, few reports have described it. A 35-year-old woman became pregnant 1 month after laparoscopic adenomyomectomy. At the 28th week…

STUDY OBJECTIVE: To investigate the feasibility and clinical usefulness of transvaginal salpingoscopy (TS) during transvaginal hydrolaparoscopy (THL) in infertile women. DESIGN: Retrospective study (Canadian Task Force classification II-3)…