Collaborative work on evaluation of ovarian toxicity 4) Effects of fertility study of 4-vinylcyclohexene diepoxide in female rats

  • Kodama Terutaka
    Toxicology and Pathology, Nonclinical Developmental Research Department, Pharmaceutical Research Laboratories, Pharmaceutical Company, Ajinomoto Co., Inc.
  • Yoshida Junichi
    Toxicology and Pathology, Nonclinical Developmental Research Department, Pharmaceutical Research Laboratories, Pharmaceutical Company, Ajinomoto Co., Inc.
  • Miwa Tadashi
    Toxicology and Pathology, Nonclinical Developmental Research Department, Pharmaceutical Research Laboratories, Pharmaceutical Company, Ajinomoto Co., Inc.
  • Hasegawa Daiki
    Toxicology and Pathology, Nonclinical Developmental Research Department, Pharmaceutical Research Laboratories, Pharmaceutical Company, Ajinomoto Co., Inc.
  • Masuyama Takeshi
    Toxicology and Pathology, Nonclinical Developmental Research Department, Pharmaceutical Research Laboratories, Pharmaceutical Company, Ajinomoto Co., Inc.

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As part of a collaborative project, 4-vinylcyclohexene diepoxide (VCD), an ovarian toxicant, was intraperitoneally administered to female Sprague-Dawley rats at 0, 5, 20 or 80 mg/kg from 2 weeks prior to mating to Day 7 of gestation. At necropsy, the number of implanted embryos, rate of implantation decreased and the rate of preimplantation loss showed an increasing tendency in the 80 mg/kg group. As for organ weight, decreases in absolute and relative ovary weight were observed in the 80 mg/kg group. Histopathologically, the ovaries showed a decrease in number of small follicles at 80 mg/kg.

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