×

Method and means for controlling the sex of mammalian offspring and product therefor

  • US 3,894,529 A
  • Filed: 04/10/1969
  • Issued: 07/15/1975
  • Est. Priority Date: 04/10/1969
  • Status: Expired due to Term
First Claim
Patent Images

1. In a method of controlling the sex of mammalian offspring, the steps of mixing fresh sperm with a nutrient medium;

  • cooling the mixture of sperm and medium to a low temperature to immobilize the sperm;

    introducing the cooled mixture of sperm and medium to a separation medium in the form of a separate body of nutrient medium, at least part of said separation medium being substantially equivalent in density to the density of said mixture and having a uniform density gradient extending from a lightest density at the top to a heaviest density at the bottom;

    applying buoyant forces to the sperm introduced to said separation medium tending to separate the sperm at levels of suspension within the separation medium according to individual sperm density;

    separating a portion of the separation medium of known density containing a suspended sperm fraction of equivalent density and desired predetermined sex characteristics; and

    artificially inseminating a female with the separated sperm fraction whereby conception occurs to produce offspring of the desired sex.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×