please check my answer thanks
True or False
Regarding the development and function of the breasts, progesterone is involved in the development of the excretory portion of the mammary gland
I say true
Since this is not my area of expertise, I searched Google under the key words "Progesterone 'mammary gland'" to get these possible sources:
http://endo.endojournals.org/cgi/content/abstract/146/3/1170
http://www.genesdev.org/cgi/content/short/14/8/889
http://www.ingentaconnect.com/content/klu/jomg/2000/00000005/00000003/00290054
http://www.jhc.org/cgi/content/abstract/47/10/1323
http://cat.inist.fr/?aModele=afficheN&cpsidt=2612910
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. Thanks for asking.