in order to test whether alterations in na+ transport systems occurring in women when the hormonal status is disturbed such as in pregnancy , under contraceptive or estradiol therapy are a direct result of hormonal action on these transport systems , na+ , k+-pump na+ , k+ outward cotransport and passive na+ permeability were measured in erythrocytes of ovariectomized rats receiving estradiol or progesterone .
C0032961
pregnancy
C0033308
progesterone