These follicles produce estradiol. At the time of ovulation, the wall of each mature follicle ruptures, and an egg with the surrounding fluid is released into the tubular part of the reproductive tract. The cells remaining in each ruptured follicle grow and fill the empty space left by the ovulated egg and fluid, forming a corpus luteum . Each corpus luteum produces progesterone. Estradiol is involved in mating behavior, secondary sex characteristics, maintenance of the female duct system, and mammary growth.
Progesterone is responsible for the maintenance of pregnancy and is also involved in mammary growth.
The oviduct is the portion of the reproductive tract that receives the eggs after ovulation. It has a funnel-shaped portion located close to the ovary called the infundibulum , which aids in the entry of the eggs into the oviduct. The oviduct is the site where fertilization of the eggs occurs. Fertilized eggs remain in the oviduct approximately 2 days before they enter the uterus. The uterus in swine consists of a short uterine body and two long uterine horns.