Abstract: The present invention provides for progesterone containing pharmaceutical oral dosage forms and related methods. The oral dosage forms can each include an amount of progesterone as well as a pharmaceutically acceptable carrier. The oral dosage forms can be formulated to have at least one of the following characteristics: the oral dosage form produces an pregnane metabolite mean blood plasma level of less than about 1000 nmol/L; the oral dosage form produces an pregnane metabolites mean blood plasma level, after administration of single dose of progesterone composition, such that the ratio of pregnane metabolite level to parent progesterone level of less than 10:1; has a dissolution rate in vitro, when measure using a USP Type-1 dissolution apparatus in 900 mL of deionized water with 2.