Postovulatory Aging of Oocytes Decreases Reproductive Fitness and Longevity of Offspring1

We analyzed the long-term effects of postovulatory aging of mouse oocytes on reproductive fitness and longevity of offspring. Hybrid (C57BL/6JIco × CBA/JIco) parental generation (F0) females were artificially inseminated at 13 h (∼1 h postovulation) or 22 h (∼10 h postovulation) after GnRH injection...

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Bibliographic Details
Published in:Biology of reproduction 2002-02, Vol.66 (2), p.495-499
Main Authors: Tarín, Juan J, Pérez-Albalá, Sonia, Pérez-Hoyos, Santiago, Cano, Antonio
Format: Article
Language:English
Subjects:
aging
Contents
fertilization
oviduct
ovulation
ovum
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Summary:We analyzed the long-term effects of postovulatory aging of mouse oocytes on reproductive fitness and longevity of offspring. Hybrid (C57BL/6JIco × CBA/JIco) parental generation (F0) females were artificially inseminated at 13 h (∼1 h postovulation) or 22 h (∼10 h postovulation) after GnRH injection. Reproductive fitness of first generation (F1) females was tested from the age of 28 wk until the end of their reproductive life. In males, the testing period ranged from the age of 2 yr until their natural death. Experimental F1 females exhibited longer between-labor intervals, decreased frequency of litters, and lower total number of litters and offspring born. Experimental second generation (F2) pups displayed teratogenic defects, higher preweaning mortality, and decreased body weight at weaning. Incidence of infertility was higher in experimental F1 males, which translated into lower total number of offspring born when compared with the control group. Life expectancy of F1 offspring was decreased in the experimental group. These results clearly show that postovulatory aging of mouse oocytes decreases reproductive fitness and longevity of offspring.
ISSN:0006-3363
1529-7268
DOI:10.1095/biolreprod66.2.495