The large amount of progesterone that is secreted by the corpus luteum works to thicken the uterine lining, which prepares the uterus for successful implantation of an embryo in the event that the egg is fertilized. (ovagraph.com)
Since women with sufficient levels of the hormone were more likely to produce top - quality embryos, researchers theorized vitamin D was involved in the production of quality eggs in the ovaries as well as the successful implantation of embryos in the uterus. (sciencedaily.com)
Some believe that certain methods prevent implantation of an embryo, and others object to all artificial birth control. (christianitytoday.com)