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.
Foods high in iron include: 1  meat, such as lamb, pork, chicken, and beef. 2  beans. 3  pumpkin and squash seeds. 4  leafy greens, such as spinach. 5  raisins and other dried fruit. 6  eggs. 7  seafood, such as clams, sardines, shrimp, and oysters.