Disclosed is a method for influencing sex selection in artificial insemination, the method characterised by the exposure of unsexed semen to antibodies to sex specific antigens present on spermatozoa carrying chromosomes of an undesired sex during the physical act of artificial insemination, whereby the spermatozoa to which the sex specific antibodies are bound are generally unable to effect fertilisation of an egg, such that fertilisation is likely to be effected by spermatozoa carrying chromosomes of a desired sex.
