TY - JOUR AU - Cole, H H; Hart, G H TI - The potency of blood serum of mares in progressive stages of pregnancy in effecting the sexual maturity of the immature rat JO - Am J Physiol VL - 93 PY - 1930 DO - 10.1152/ajplegacy.1930.93.1.57 SP - 57 EP - 68 ER -