Luteal phase estrogen is decreased in regularly menstruating older women compared with a reference population of younger women.
Mersereau JE, Evans ML, Moore DH, Liu JH, Thomas MA, Rebar RW, Pennington E, Cedars MI. Luteal phase estrogen is decreased in regularly menstruating older women compared with a reference population of younger women. Menopause. 2008 May-Jun; 15(3):482-6.