Rikikazu Sugiyama
ORCID: 0000-0002-8892-2119
· 17 papers in corpus
2023
observational
2022
PURPOSE: Can relugolix, a novel oral gonadotropin-releasing hormone receptor (GnRH) antagonist, function as an alternative ovulation inhibitor to GnRH antagonist injections? METHODS: This single-center, cross-sectional retrospective study …
2022
observational
2020
OBJECTIVE: To elucidate the risk factors associated with resignation from work of Japanese women undergoing infertility treatment. METHODS: A total of 1727 female patients who attended a private fertility clinic in Japan participated in th…
observational
2019
STUDY OBJECTIVE: To analyze the clinical outcomes of and predictive factors for the therapeutic effect of combination treatment of preoperative embryo cryopreservation and endoscopic surgery (surgery-assisted reproductive technology [ART] h…
nonrandomized-trial
2018
Vitamin D (VD) deficiency is associated with reproductive failure. However, the relationship between VD and maternal immunity remains unclear. We investigated the clinical efficacy of VD in maternal T-helper (Th) cytokines in 276 infertile …
observational
2017
OBJECTIVE: The endometriosis fertility index (EFI) is a novel index for predicting pregnancy after surgery. We investigated the utility of the EFI for predicting the ability to conceive without assisted reproductive technology (ART) treatme…
other
2015
PURPOSE: To investigate whether clomiphene citrate (CC) affects uterine receptivity or not, we evaluated pregnancy rates (PR) during the hormone replacement cycle (HRC) according to the period between the last day of CC administration and t…
observational
2015
Measurement of oxidative stress in the follicular fluid of infertility patients with an endometrioma
PURPOSE: Follicular fluid (FF) might reflect the environment during follicle and oocyte growth, and an evaluation of oxidative stress in the FF might be useful in predicting oocyte quality. In order to measure the oxidative stress (OS) in t…
2014
observational
2013
AIM: The aim of this study was to observe the insides of the fallopian tubes of patients with unilateral or bilateral endometriomas by using salpingoscopy and evaluate the inner cavity of the fallopian tubes according to our original scorin…
other
2013
PURPOSE: The purpose of this study was to investigate how many oocytes are needed to achieve an adequate pregnancy rate per 1 oocyte retrieval cycle in mild ovarian stimulation. METHODS: This protocol consisted of clomiphene citrate and re…
other
2012
PURPOSE: The purpose was to establish a mild ovarian stimulation protocol that would help assisted reproductive technology (ART) units to avoid scheduling on weekends. METHODS: This protocol directed patients to take 50 mg/day of clomiphen…
observational
2010
A new evaluation score that uses salpingoscopy to reflect fallopian tube function in infertile women
OBJECTIVE: To build an evaluation scoring system using the results of salpingoscopy, and to evaluate the relationship between this scoring system and the outcome of pregnancy. DESIGN: Retrospective study. SETTING: Sugiyama Clinic. INTERV…
other
2010
PURPOSE: To determine whether embryos cultured with a low oxygen level (2%) brought about beneficial effects on the outcome of ART. METHODS: This is a sequential case-control embryo-culture study. Embryos were cultured either with a gas mi…
other
2010
PURPOSE: We attempted clinical application of a plastic blade, which is a novel cryopreservation device, for vitrification of human embryos and blastocysts. METHODS: Between February 2003 and December 2007, a total of 4,430 Day 3 embryos f…
observational
2008
PURPOSE: To establish an index to predict ART outcomes and to identify infertile patients who need LH supplementation during ovarian stimulation. METHODS: Serum LH concentrations were measured during the mid- and late-follicular phase in 8…