Normal Prenatal Growth of the Golden Hamster

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  • LEE Cha Soo
    <I>Department of Veterinary Anatomy, Faculty of Agriculture, University of Tokyo</I>
  • NISHIDA Takao
    <I>Department of Veterinary Anatomy, Faculty of Agriculture, University of Tokyo</I>
  • MOCHIZUKI Koshi
    <I>Department of Veterinary Anatomy, Faculty of Agriculture, University of Tokyo</I>

Bibliographic Information

Other Title
  • ハムスター胎子の正常発育と成長
  • ハムスター タイシ ノ セイジョウ ハツイク ト セイチョウ

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Description

In the golden hamster (Mesocricetus auratus) the gestation period and the loculus size of the gravid uterus from day 6 to day 15.5 (parturition) of gestation as well as the weight, width (umblicus-back) and lenght (crown-rump) of the embryos from day 9 to the parturition were measured. The results obtained were as follows :<BR>1. The gestation period of the golden hamster was 15 days and 15±3 hours post coitum.<BR>2. The average values of the length (in the direction of uterine long axis) and width (mesometrial-antimesometrial axis) in the loculus of the gravid uterus were 0.39 cm and 0.56 cm at 6 days, and 2.42 cm and 1.74 cm at 15.5 days (parturition), respectively.<BR>3. The average values of the crown-rump measurements, width (umblicus-back) and weight in the hamster embryos were 0.42 cm, 0.24 cm and 0.026 g at 9 days, and 2.40 cm, 1.39 cm and 2.272 g at 15.5 days (parturition), respectively.<BR>4. The loculus size of the gravid uterus, the crown-rump measurements and width (umblicusback) of the embryos in the period from day 13 to day 14 of gestation were markedly increased in comparison with any other period, and the weight increase of the embryos occured rapidly from day 13 of gestation.<BR>5. The shape of the loculus during the gestation was ovoid (mesometrial-antimesometrial axis) until the end of 10 days converged to the spherical form and thereafter changed gradually to the ovoid from in the direction of uterine long axis contraly to the previous days.

Journal

  • EXPERIMENTAL ANIMALS

    EXPERIMENTAL ANIMALS 24 (2), 53-60, 1975

    Japanese Association for Laboratory Animal Science

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