Pharmacological tests revealed the flavonoids in Soyabean sprouts (S S) can help in the deficient-estradiol cases on the tested mice. Methods & Materials: Mice, Elisa test, Atswood test and the test of estradiol activity on the weightResults: ELISA test proved that the utilization of S S during 15 days only has the effect in recovery of estradiol on the estrogen-deficiency-induced mice, without the estrogenic-activity on the normal mice.