Levonorgestrel and Norethindrone Plasma Levels After Single Oral Dose
				14
																												Norethindrone 1000 µg Levonorgestrel 150 µg
				12
				10
					8
					6
					4
					2
					0
							0									6					12					18			24				30		36				42			48
																							Hours After Administration
	Stanczyk FZ. In: Lobo RA, ed.  Treatment of the Postmenopausal Woman: Basic and Clinical Aspects. Raven Press,1994.