Levels of estradiol (pg/mL), estrone (pg/mL), estriol (pg/mL), progesterone (ng/mL), and 17α-hydroxyprogesterone (17α-OHP) in women during weeks 6 to 42 of pregnancy. Source of the values: (April 1972). "Plasma estrone, estradiol, estriol, progesterone, and 17-hydroxyprogesterone in human...