Corpus luteum - Development and structure. 1  The corpus luteum develops from an ovarian follicle during the luteal phase of the menstrual cycle or oestrous cycle, following the release of a secondary oocyte from the follicle during ovulation.
Iron found in foods is either in the form of heme or non-heme iron. Heme iron is better absorbed than non-heme iron. Foods containing heme iron are the best for increasing or maintaining healthy iron levels. Such foods include (in order of iron-richness) clams, oysters, organ meats, beef, pork, poultry, and fish.
Iron-rich Foods. The best sources of iron are iron-rich foods. The iron in meat, heme iron, is easiest for your body to absorb. Iron-rich foods include beef, lamb and shrimp. The iron in plants, non-heme iron, does not absorb easily but it is still a good dietary source. Iron-rich plants include spinach, whole wheat, strawberries and lentils.