Hayashi N

Menstrual symptoms, including primary dysmenorrhea and premenstrual syndrome, are significant problems affecting women's health condition. However, their biological functions are still unclear. The objective of this study was to elucidate p…

PURPOSE: To investigate the usefulness of an original dual artificial intelligence (AI) system, in which the first AI system eliminates the background of sliced tomographic blastocyst images, then the second AI system predicts implantation …

Despite widespread cervical cancer (CC) screening programs, low participation has led to high morbidity and mortality rates, especially in developing countries. Because early-stage CC often has no symptoms, a non-invasive and convenient dia…

PurposeThis study aimed to analyze whether tripronuclear (3PN) zygotes, with two normal-sized PNs and an additional smaller PN (2.1PN), can be used for embryo transfer.MethodsA retrospective embryo cohort study was conducted on 695 patients…

INTRODUCTION AND HYPOTHESIS: In women with chronic pelvic pain (CPP), interstitial cystitis/bladder pain syndrome (IC/BPS) and endometriosis frequently coexist. The mechanism of these diseases coexisting is explained by cross-sensitization …

BACKGROUND: Levonorgestrel-releasing intrauterine systems (LNG-IUSs) gradually release levonorgestrel into the uterus and is effective against hypermenorrhoea and dysmenorrhea. Complications associated with the insertion include expulsion, …

PURPOSE: This study aimed to analyze whether the presence of refractile bodies (RFs) negatively affects fertilization, embryo development, and/or implantation rates following intracytoplasmic sperm injection (ICSI). METHODS: This retrospec…

PURPOSE: To evaluate the outcomes of embryo transfer (ET) and to identify the parameters influencing pregnancy outcomes. METHODS: This study included 938 ET cycles involving single frozen and thawed good-quality blastocyst (Gardner grade ≥…

PURPOSE: To make the artificial intelligence (AI) classifiers of the image of the blastocyst implanted later in order to predict the probability of achieving live birth. METHODS: A system for using the machine learning approaches, which ar…

PURPOSE: To identify artificial intelligence (AI) classifiers in images of blastocysts to predict the probability of achieving a live birth in patients classified by age. Results are compared to those obtained by conventional embryo (CE) ev…

PURPOSE: To identify the multivariate logistic regression in a combination (combination method) involving artificial intelligence (AI) classifiers in images of blastocysts along with a conventional embryo evaluation (CEE) to predict the pro…

AimOutside of Japan, recombinant-human chorionic gonadotropin (r-hCG) is widely used for the induction of final follicular maturation and early luteinization in women undergoing ovulation induction; whereas in Japan, urine-derived hCG (u-hC…

AimThis study evaluated the efficacy and safety of vaginal progesterone gel that was administered daily for luteal phase support as part of in vitro fertilization/embryo transfer (IVF/ET) cycles in Japanese women.MethodsThis was a phase III…

For endometrial cancer patients, lymphadenectomy is recommended to exclude rarely metastasized cancer cells. This procedure is performed even in patients with low risk of recurrence despite the risk of complications such as lymphedema. A me…

Although the pathogenesis of interstitial cystitis/bladder pain syndrome remains unknown, there is a significant correlation of interstitial cystitis/bladder pain syndrome with other chronic pain disorders, such as irritable bowel syndrome,…

Laparoscopic cholecystectomy (LSC) was attempted in 30 patients and was accomplished in 29 during the nine months between March and November 1991. Twenty eight patients had cholelithiasis with or without adenomyosis, and two had adenomyosis…

Luteal function in 44 infertile women with endometriosis were studied with reference to prolactin (PRL) and compared with 34 unexplained infertile women without endometriosis. To assess luteal function, serum progesterone (P4) levels were m…