Developing a Mammary Gland is a Stāt Affair

@article{Hennighausen2004DevelopingAM,
  title={Developing a Mammary Gland is a Stāt Affair},
  author={Lothar Hennighausen and Gertraud W. Robinson and Kay-Uwe Wagner and Xiuwen Liu},
  journal={Journal of Mammary Gland Biology and Neoplasia},
  year={2004},
  volume={2},
  pages={365-372}
}
The mammary gland is a recent acquisition on the phylogenetic scale of organ evolution and is characterized by an unparalleled regenerative capacity. With each pregnancy an expanded lobulo-alveolar compartment rises on the ductal compartment and differentiates to secrete large amounts of milk during lactation. After weaning of the young the entire alveolar compartment undergoes apoptosis and is remodeled to return to a virgin-like state. Evolution recruited old hands from existing signaling… 

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