Serum and tissue sodium/potassium changes in estrogen treated female albino rats.

Five control and ten estrogen treated albino rats were studied for changes in sodium and potassium in serum, heart, muscle, uterus and brain. The serum levels of sodium depleted significantly in the estrogen treated rats. Of the tissues studied, only uterus and brain had significantly sodium retention effect. The potassium levels on the other hand decreased significantly, both in serum and tissues following treatment with estrogen.