Artificial insemination is the injection of SEMEN into the vagina by instrumental means. The first artificial inseminations of viviparous (live-bearing) animals were performed by the 18th-century Italian physiologist Lazzaro Spallanzani, who proved that the male contribution to reproduction resided in the semen, although he did not recognize spermatozoa as the fertilizing agents. Pioneering.
Artificial Insemination is a method in which collects the semen of a bull into a tube and is manually implanted into a cows uterus. Natural service is breeding in which is done completely by the bull with natural instinct. What is best for the future for America? Does Artificial Insemination stand to be a better path economically and.