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 is found naturally in many foods and is added to some fortified food products. 1  Lean meat, seafood, and poultry. 2  Iron-fortified breakfast cereals and breads. 3  White beans, lentils, spinach, kidney beans, and peas.  Nuts and some dried fruits, such as raisins.