Toshihiro Kawamura

OBJECTIVE: To study the earliest timepoint at which serum human chorionic gonadotropin (hCG) can predict live birth after blastocyst frozen embryo transfer, and to determine the cutoff values for hCG levels on days 7-11 after frozen-thawed …

The effects of body mass index (BMI) on assisted reproductive technology (ART) outcomes such as ovarian dysfunction, poor ovum quality, and endometrial dysfunction have been studied; however, many aspects remain controversial. Therefore, we…

PURPOSE: Although studies of serum anti-Müllerian hormone (AMH) in predicting ovarian reserve are numerous, many studies utilized patients under age 40. However, the assessment of ovarian reserve is especially critical in older infertile wo…

PURPOSE: Frozen embryo transfer has been established as an indispensable ART procedure for both the effective use of surplus embryos and the prevention of ovarian hyperstimulation syndrome. The frequency of frozen embryo transfer is increas…

Aim:  The mild ovarian stimulation protocol for in vitro fertilization (IVF) is carried out to minimize adverse side-effects as well as cost. While performing mild ovarian stimulation with a gonadotropin-releasing hormone (GnRH) antagonist,…

PURPOSE: While performing the mild ovarian stimulation protocol with a GnRH antagonist, the pregnancy rate was compared between the groups, which were divided by the degree that the luteinizing hormone (LH) level decreased. MATERIALS AND M…

Background:  Steroid levels have been used as the predictive parameters for oocyte maturation and embryo development. In the present study, estradiol and progesterone concentrations in the follicular fluid and serum were evaluated in conven…

Objective:   Blastocysts are reportedly suitable for preventing multiple pregnancies as a result of the high implantation rate per embryo. The present study compared clinical results for elective single embryo transfer (ET) between blastocy…