Yasushi Takai

AIM: To investigate whether the etiology of diminished ovarian reserve (DOR) independently influences outcomes of assisted reproductive technology (ART). METHODS: This multicenter, retrospective cohort study was a secondary analysis of a n…

BACKGROUND Robot-assisted hysterectomy (RASH) for benign uterine disease has been covered by insurance in Japan since 2018. Our department introduced RASH in December 2020, and the number of procedures has increased without major complicati…

AIM: To investigate the efficacy and safety of long-term adjusted low-dose gonadotropin-releasing hormone agonist therapy (GnRH agonist drawback therapy) with nafarelin acetate in patients with uterine fibroids and/or adenomyosis with menst…

Endometrial stromal sarcoma, a rare disease, accounts for approximately 0.2％ of all types of uterine malignancies. The disease may be difficult to differentiate from the benign one using preoperative imaging and histological diagnosis. We r…

OBJECTIVE: Incarcerated gravid uterus is a condition in which uterine myoma and intraperitoneal adhesion lead to persistent uterine retroversion. Accurate diagnosis before cesarean section is crucial so that the procedure can be planned wit…

PURPOSE: To determine the influence of a patient education and care program on the quality of life (QOL) of female patients undergoing non-assisted reproductive technology (ART) fertility treatment. METHODS: Participants completed the MOS …

OBJECTIVES: Pregnancy complicated with ovarian endometrioma is a risk factor for preterm delivery and rupture or infection during pregnancy. This study aimed to clarify the effectiveness and safety of transvaginal aspiration during pregnanc…

Introduction: A unicornuate uterus with a noncommunicating rudimentary horn is a rare congenital uterine malformation that causes lower abdominal pain and dysmenorrhea due to endometriosis and uterine hematoma. We encountered a case of a un…

In 2014, we published an article titled "Novel uterine sarcoma preoperative diagnosis score predicts the need for surgery in patients presenting with a uterine mass" on the preoperative diagnosis of uterine sarcoma, in the SpringerPlus (Nag…

We report two cases of placenta accreta identified during pregnancy after laparoscopic surgery. The first case involved a 39-year-old woman with a history of miscarriage. Ultrasonography and MRI revealed multiple uterine myomas and adenomyo…

Preoperative diagnosis of uterine sarcoma is very difficult, and currently, its diagnostic accuracy is not satisfactory. It is therefore important to perform surgery and establish the pathological diagnosis if the clinical findings and vari…

PROBLEM: In the quest for possible involvement of stem cell factor (SCF), a cytokine known to have multiple effects, in the pathogenesis of endometriosis, we evaluated concentrations of SCF in peritoneal fluid (PF) of women with or without …

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) has been suggested as a possible etiologic factor for endometriosis, a condition in which endometrium-like tissues are present outside the uterus. The prevailing view pertaining to the origin of en…

The concentrations of hepatocyte growth factor (HGF) in peritoneal fluid (PF) from women with endometriosis (n = 36) and without endometriosis (n = 40) were measured. All of the PF samples examined contained detectable concentrations of HGF…

Vaginal agenesis combined with a functional uterus is a rare condition in which treatment modalities that preserve reproductive function are controversial. A 21 year old female presented with congenital vaginal agenesis combined with cervic…