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Effects of high-dose and multiple-dose gonadotropin stimulation on mouse oocyte quality as assessed by preimplantation development following in vitro fertilization

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Abstract

The effects of increasing the level of ovarian stimulation on preimplantation embryonic development were assessed using a mouse in vitro fertilization system. When F1 hybrid (C57BL/6 × CBA/Ca) mice received a single injection of 5 IU pregnant mare's serum gonadotropin (PMSG) followed 60 hr later by 5 IU human chorionic gonadotropin (hCG) approximately 50% of the resultant postovulatory oocytes developed to the blastocyst stage following in vitro fertilization. Increasing the single dose of PMSG to 10 or 15 IU resulted in significant reductions in the frequency of development to the blastocyst stage. When one or two additional doses of 5 IU PMSG were administered 24 and 48 hr after an initial injection of 5 IU, lower frequencies of oocytes with the potential for full preimplantation development were again observed. This reduction in gamete quality was significantly greater when the final dose of PMSG was administered only 12 hr prior to hCG. The results suggest that excessive gonadotropin stimulation may compromise the quality of the preimplantation embryos obtained following in vitro fertilization and that the timing of gonadotropin administration may also be critical.

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Authors and Affiliations

  1. Unit of Reproductive Medicine, Department of Obstetrics and Gynaecology, University of Dundee Medical School, Ninewells Hospital, Dundee, UK

    David H. Edgar, Katherine M. Whalley & John A. Mills

Authors
  1. David H. Edgar
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  2. Katherine M. Whalley
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  3. John A. Mills
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Edgar, D.H., Whalley, K.M. & Mills, J.A. Effects of high-dose and multiple-dose gonadotropin stimulation on mouse oocyte quality as assessed by preimplantation development following in vitro fertilization. J Assist Reprod Genet 4, 273–276 (1987). https://doi.org/10.1007/BF01555203

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  • DOI: https://doi.org/10.1007/BF01555203

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