Compounded bioidentical hormones in the USA typically contain a large quantity of estriol, a weak estrogen. The rationale for this is that rats pretreated with estriol developed less breast cancer ...
Urine estriol assays were used clinically for many years as a third-trimester index of fetal well-being. Measurement of estriol in second-trimester maternal serum is now a component of triple screen.
Cloxacillin may reduce the effect of estriol, sodium picosulphate. • Tetracyclines may reduce the effect of cloxacillin. • Probenecid may increase the blood concentration of cloxacillin.