7010-2650 recognizes 17 beta estradiol, a mammalian estrogenic hormone, produced in the ovaries, placenta and testis that has a role in normal sexual development and the regulation of the menstrual cycle.The following cross reactivites have been observed: 17-beta Oestradiol 100%Oestrone14%Oestriol5% Aldosterone, Cortisol, Corticosterone, DHEA, Deoxycorticosterone, Pregnenolone, Progesterone, 17OH-P and Testosterone all <0.01%