Volume 29 Issue 3, March 2019

Dramatic oscillation of ovarian steroid hormones during pregnant stage leads to obvious morphological changes of mammary gland and endows luminal cells with unexpected plasticity. The cover image shows a few green sakura among clusters of cherry sakura on the tree, which resemble the scene of luminal-derived basal cells (LdBCs) on the mouse mammary gland ductal tree during pregnancy. See page 206-220 by Wenqian Song et al. for details.