Figure 1From: Insulin-like growth factor (IGF)-I obliterates the pregnancy-associated protection against mammary carcinogenesis in rats: evidence that IGF-I enhances cancer progression through estrogen receptor-α activation via the mitogen-activated protein kinase pathwaySchematic representation of the animal treatments used in the present study. E2, 17β-estradiol; IGF, insulin-like growth factor; MNU, N-methyl-N-nitrosourea; P4, progesterone.Back to article page