Which hormone is NOT impoant in the growth of the duct system of the breast?

Progesterone stimulates growth of the lobules and acini of the breast. It also causes an increase in interstitial fluid in the breast, paicularly in the perilobular stroma. Estrogen promotes fat deposition and growth of both stroma and the duct system of the breast. Other hormones such as insulin, growth hormone, glucocoicoids, and prolactin are impoant for the growth of the duct system of the breast. Ref: Molina P.E. (2013). Chapter 9. Female Reproductive System. In P.E. Molina (Ed), Endocrine Physiology, 4e.