The foal is the first horse conceived in a laboratory using an egg taken from a live mare and implanted into a surrogate mare.
Two years ago, scientists at Colorado State University doing similar research helped a surrogate mare deliver a foal conceived in a laboratory, but egg cells taken from ovaries at a slaughterhouse, not from a live mare, were used.
Sweet Pea was foaled June 23, weighing 61 pounds.
The importance of the LSU advance centres on using a live donor mare to collect eggs in a nonsurgical procedure.
Breeders can use the procedure to produce offspring from valuable mares without risking injury, if a mare is infertile, if a stallion has a low sperm count, or if a breeder wants to get more than one offspring per year from the mare.