Roof rats are the worst rodent pest in the state of Florida and most abundant. The Norway rat (Rattus norvegicus) that is familiar to most people is rare in Florida. Roof rats consume and destroy stored animal and human food, attack fruit crops, and take up residence in attics, soffits, hollow walls, and out-buildings.
1 The sperm brings in another 23 chromosomes to complement the 23 held in the egg to get to a total of 46 chromosomes - what all of us normal people have.  We know from in vitro fertilization studies that the egg is only capable of being fertilized for about 24 hours after ovulation.
If it meets up in the fallopian tube with a viable sperm and becomes fertilized, it continues traveling dorn the fallopian tube.Fertilization usually happens within 12-24 hours after ovulation. After fertilization the fertilized egg starts traveling down the fallopian tube toward the uterus.