Average levels of steroids in breast tissue of healthy women.^a.

aTen healthy breast tissue samples were analyzed at least 2 times. The data obtained from UPLC-MS/MS were processed and normalized to pmole/gm of tissue. bSince the E1 and E2 forms are inter convertible, the total amount for each E1 plus E2 derivative in the various categories are presented in the last column. cAll 4-OHE1(E2) conjugates are pooled together. dAll 2-OHE1(E2) conjugates are pooled together. nd – Not detected.