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.
Let's take a look at some foods that are rich in iron. Red meat. Red meat such as beef and pork, especially their liver, is abundant in iron. For example, 100g (3.5 oz) of beef liver contains 6.1mg of iron but it may not be a top choice for many because of their strong flavor.