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Related Experiment Videos

Luteotrophic activity of ectopically developing rat blastocysts.

G H Zeilmaker, C M Verhamme

    Acta Endocrinologica
    |July 1, 1978
    PubMed
    Summary

    Ectopic rat blastocysts produced a luteotrophic hormone, maintaining pregnancy in mice and rats. This hormone supports the corpus luteum, crucial for successful gestation.

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    Area of Science:

    • Reproductive biology
    • Endocrinology
    • Developmental biology

    Background:

    • The corpus luteum is essential for maintaining pregnancy.
    • Hormonal regulation of pseudopregnancy is complex.
    • Trophoblast tissue is known to produce hormones crucial for pregnancy.

    Purpose of the Study:

    • To investigate if ectopically transplanted rat blastocysts produce a luteotrophic hormone.
    • To determine the effect of ectopic rat trophoblast on pseudopregnancy in mice and rats.

    Main Methods:

    • Rat blastocysts were transplanted into the kidneys of cyclic and pseudopregnant mice and rats.
    • Pseudopregnancy was induced and monitored in recipient animals.
    • The duration of pseudopregnancy was assessed in the presence of ectopic trophoblastic tissue.

    Main Results:

    • Pseudopregnancy was successfully induced in nearly all cyclic mice with trophoblastic outgrowths.
    • Pseudopregnancy was not consistently induced in cyclic rats.
    • Ectopic rat blastocysts significantly prolonged pseudopregnancy in both mice and rats.

    Conclusions:

    • Ectopically developing rat trophoblastic tissue actively produces a luteotrophic hormone.
    • This hormone plays a role in maintaining the corpus luteum and prolonging pseudopregnancy.
    • The findings support the concept of trophoblast-derived luteotrophic support in pregnancy.

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