Mammary gland gestation, serum progesterone remains at a stably high concentration so signaling through its receptor is continuously activated. As one of the transcribed genes, Wnts secreted from mammary epithelial cells act paracrinely to induce more neighboring cells' branching. When the lactiferous duct tree is almost ready, "leaves" alveoli are differentiated from luminal epithelial cells and added at the end of each branch. In late pregnancy and for the first few days after giving birth, colostrum is secreted. Milk secretion (lactation) begins a few days later due to reduction in circulating progesterone and the presence of another important hormone prolactin, which mediates
Giving Birth to a Stone Giving Birth to a Stone Giving Birth to a Stone is the debut and only studio album by UK metal band Peach, released in 1994 through Mad Minute Records. It was re-released in 2000 through Beatville Records, with different artwork, designed by Adam Jones of Tool. It was re-released again globally on April 2, 2007 through Sony BMG - and is also being made available in downloadable formats. The song "You Lied" was covered live by Tool and was included on their box set "Salival". Following the album's release, Peach broke-up in 1995, reforming under the name Suns of Tundra