In this book the author discusses the normal and pathologic water metabolism of pregnant women. He first considers the significance of water for organic life and then takes up the question of the amount of blood and plasma found during pregnancy, the effect on these amounts produced by labor and their association with pregnancy edema. He also discusses venous pressure in healthy gravid women, in gravid women with toxemia and in women during labor. Another subject considered is the dependence of the colloid-osmotic pressure on the serumprotein picture in normal pregnancy in cases of toxemia and during the puerperium. The author also takes up the question Is the vascular system more permeable to fluids and plasma during pregnancy? He answers this in the affirmative because he found increased permeability for water in 83 per cent of all the pregnant women investigated and increased permeability for protein in 62 per cent.