Letterie Gerard S, Lee James S, Padmanabhan Vasantha
Northwest Center for Reproductive Sciences, Seattle, Washington 98119, USA..
Fertil Steril. 2006 Nov;86(5):1547-9. doi: 10.1016/j.fertnstert.2006.03.060. Epub 2006 Sep 25.
Changes in FSH isoforms occur at temporally specific times during the menstrual cycle and reproductive lifespan. Changes in ratio in FSH isoforms may provide a sensitive test of ovarian reserve before IVF.