Koyama N

No ORCID on file · 2 papers in corpus

2026

Prevalence and Determinants of Low Serum Vitamin D Among Women Attending Infertility Clinics in Japan: A Real-World Multicenter Cross-Sectional Study.

Reproductive medicine and biology ·doi:10.1002/rmb2.70032

PurposeTo estimate the prevalence and correlates of low serum 25-hydroxyvitamin D [25(OH)D] among women attending infertility clinics in Japan.MethodsWe conducted a multicenter cross-sectional study of 17 261 women with measured 25(OH)D. De…

article 1993

Cytokines in the peritoneal fluid of patients with endometriosis

International Journal of Gynecology & Obstetrics ·doi:10.1016/0020-7292(93)90273-y

OBJECTIVE: To determine which of the various cytokines interleukin-5 (IL-5), interleukin-6 (IL-6) and interleukin-1 (IL-1) are important in endometriosis. METHODS: Peritoneal fluid (PF) samples were taken from 55 women at the time of either…