The present invention provides for progesterone containing pharmaceutical oral dosage forms, pharmaceutical kits, and related methods. In one embodiment, an oral dosage form formulated for on-going administration is provided. The oral dosage form includes an amount of progesterone and a pharmaceutically acceptable carrier. The oral dosage form is formulated such that upon single dose administration to a non-pregnant woman in follicular phase, the oral dosage form provides a serum progesterone C24h of at least 0.20 ng/mL.
