Masako Hayashi

Learn More
OBJECTIVE To compare obstetric and perinatal outcomes of singleton pregnancies conceived with different types of assisted reproductive technology (ART) procedures with those of naturally conceived pregnancies. DESIGN Retrospective cohort study. SETTING The perinatal database of the Japanese Society of Obstetrics and Gynecology. PATIENT(S) A total of(More)
Objective: The aim of this study was to assess the frequency of severe perineal lacerations defined as either third- or fourth-degree lacerations during normal spontaneous vaginal delivery and to evaluate potential risk factors in Japanese patients. Materials and methods: An electronic audit of the perinatal database at the Tama-Nagayama Hospital of Nippon(More)
PURPOSE To evaluate whether type and location of placenta previa affect risk of antepartum hemorrhage-related preterm delivery. METHODS We retrospectively studied 162 women with singleton pregnancies presenting placenta previa. Through observation using transvaginal ultrasound the women were categorized into complete or incomplete placenta previa, and(More)
Previous studies have shown that HDAC inhibitors selectively inhibit IL-2 gene expression, but the mechanism of this inhibition remains to be elucidated. It was recently reported that HDAC4, a component of the nuclear hormone receptor corepressor (N-CoR) complex, associates with the IL-2 promoter via the transcription factor myocyte enhancer factor 2(More)
PURPOSE The "inappropriately heavy placenta" has been considered to be associated with various pregnancy disorders; however, data is scarce what factors affect it. To determine whether the following three affect it; (1) infant gender and mother's parity, (2) growth restriction, and (3) preeclampsia. METHODS We employed fetal/placental weight ratio (F/P).(More)
OBJECTIVE In 2007 and 2008, the Japan Society for Reproductive Medicine and the Japan Society of Obstetrics and Gynecology issued a recommendation for single embryo transfer (SET). Thereafter, SET was implemented in 73% of in vitro fertilization (IVF) cases in Japan. The purpose of this study was to evaluate the effects of compliance with the SET(More)
AIM Intrapartum management guidelines based on fetal heart rate classification comprising a 5-tier system (Levels 1-5) was proposed by the Perinatology Committee of the Japan Society of Obstetrics and Gynecology (JSOG). This study aimed to assess the reproducibility and clinical usefulness of this classification. METHODS For assessing intraobserver and(More)
1. Green MT, Rosborough JP, Dunkel EC. In vivo reactivation of herpes simplex virus in rabbit trigeminal ganglia: electrode model. Infect Immun 1981;34:69–74. 2. Green MT, Dunkel EC, Courtney RJ. Detection of Herpes simplex virus induced polypeptides in rabbit trigeminal ganglia. Invest Ophthalmol Vis Sci 1984;25:1436–1440. 3. Nesburn AB, Dickinson R,(More)
Recombinant human granulocyte colony-stimulating factor (rhG-CSF) has been used for treatment of neutropenia. Filgrastim, Nartograstim, and Lenograstim are clinically available in Japan. However, the differences in potential benefit for radiation-induced disorder between these types of rhG-CSFs remain unknown. Therefore, the effects of three different types(More)
OBJECTIVE The objective of this study was to explore factors influencing the accuracy of transvaginal digital examination for determining fetal head position during the first stage of labor. MATERIALS AND METHODS Fetal head position was assessed in 87 women in the first stage of labor at term with normal singleton cephalic presentation. Transvaginal(More)