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Related Experiment Videos

Sex preselection.

R H Glass

    Obstetrics and Gynecology
    |January 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Selecting a child's sex before conception is challenging. While methods exist to separate X and Y sperm, their effectiveness in humans, particularly with sperm sorting techniques, requires further investigation.

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    Area of Science:

    • Reproductive biology
    • Genetics
    • Human reproduction

    Background:

    • Attempts to pre-select a child's sex have been made in both animals and humans.
    • Methods like centrifugation and density gradient sedimentation have been used to separate X and Y sperm in animals, with density gradient sedimentation showing some success in altering sex ratios.
    • In humans, popular methods for influencing sex selection include timing of intercourse and artificial insemination relative to ovulation.

    Purpose of the Study:

    • To review existing methods for sex selection prior to conception.
    • To evaluate the efficacy of different sperm separation techniques.
    • To assess the success claims of popular human sex selection methods like coital timing.

    Main Methods:

    • Review of techniques used for X and Y sperm separation in animals (centrifugation, microelectrophoresis, density gradient sedimentation).

    Related Experiment Videos

  • Examination of human sex selection methods, including coital timing and artificial insemination.
  • Discussion of sperm identification using quinacrine staining to identify Y-chromosome-bearing sperm.
  • Analysis of Ericsson's findings on sperm migration in albumin columns using Y-chromosome markers.

    • Main Results:

    • Density gradient sedimentation is the only technique to have demonstrably altered sex ratios in animals.
    • Claims of success for coital timing in humans warrant caution.
    • Y-chromosome-bearing sperm can be identified via quinacrine staining.
    • Ericsson's research indicates a high percentage of Y-bearing sperm in the distal portion of albumin columns.

    Conclusions:

    • Current methods for sex selection, especially coital timing in humans, lack robust scientific validation.
    • Sperm sorting techniques show promise, but their ability to produce a male preponderance has not yet been proven.
    • Further research is needed to confirm the efficacy of sperm separation technologies for reliable human sex selection.