<P> The introduction of prostaglandins at this point causes the degeneration of the corpus luteum and the abortion of the fetus . However, in placental animals such as humans, the placenta eventually takes over progesterone production and the corpus luteum degrades into a corpus albicans without embryo / fetus loss . </P> <P> Luteal support refers to the administration of medication (generally progestins) for the purpose of increasing the success of implantation and early embryogenesis, thereby complementing the function of the corpus luteum . </P> <P> The yellow color and name of the corpus luteum, like that of the macula lutea of the retina, is due to its concentration of certain carotenoids, especially lutein . In 1968, a report indicated that beta - carotene was synthesized in laboratory conditions in slices of corpus luteum from cows . However, attempts have been made to replicate these findings, but have not succeeded . The idea is not presently accepted by the scientific community . Rather, the corpus luteum concentrates carotenoids from the diet of the mammal . </P> <P> Similar structures and functions of the corpus luteum exist in some reptiles . Dairy cattle also follow a similar cycle . </P>

Which of the following hormones is released by the corpus luteum after ovulation