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Related Experiment Videos

When a conception fails to become a pregnancy.

R V Short

    Ciba Foundation Symposium
    |January 1, 1978
    PubMed
    Summary

    Embryonic mortality can be a beneficial reproductive strategy, preventing overpopulation and ensuring offspring health. This mechanism also protects against genetically defective embryos, safeguarding species

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    Reply from I.p.f. Owens and R.v. Short.

    Trends in ecology & evolution·2011

    Area of Science:

    • Reproductive biology
    • Developmental biology
    • Evolutionary biology

    Background:

    • Reproductive success is influenced by numerous factors.
    • Understanding reproductive failure is crucial for species survival.
    • Previous work has detailed components of reproductive success.

    Purpose of the Study:

    • To explore the aetiology of reproductive failure.
    • To examine the role of embryonic mortality as a regulatory and protective mechanism.
    • To investigate the extent and nature of embryonic loss in humans and animals.

    Main Methods:

    • Review of existing literature on reproductive success and failure.
    • Analysis of density-dependent mechanisms in reproduction.
    • Comparative examination of embryonic mortality across species.

    Main Results:

    • Embryonic mortality can be advantageous, acting as a density-dependent mechanism to regulate litter size in polytocous species.
    • In monotocous species, embryonic mortality can prolong inter-birth intervals, preventing impaired offspring development.
    • Embryonic mortality serves as a protective mechanism against genetically defective offspring by evading maternal immunological surveillance.

    Conclusions:

    • Embryonic mortality is a vital component of reproductive strategy, contributing to species'
    • This mechanism ensures offspring quality and optimizes resource allocation.
    • Further research into embryonic loss in humans and animals is warranted.

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