FIG. 24. Whole mount of a mammary gland from a virgin mouse after 5 days in semi-defined
medium without additional hormones showing regression of the mammary ducts. Gallocyanin-eosin. x 180. (By courtesy of J. A. Prop.)
FIG. 25. Whole mount of a similar gland kept for 5 days in medium to which insulin, prolactin,
progesterone and hydrocortisone had been added. Gallocyanin-eosin. (By courtesy of J. A. Prop.)
medium without additional hormones showing regression of the mammary ducts. Gallocyanin-eosin. x 180. (By courtesy of J. A. Prop.)
FIG. 25. Whole mount of a similar gland kept for 5 days in medium to which insulin, prolactin,
progesterone and hydrocortisone had been added. Gallocyanin-eosin. (By courtesy of J. A. Prop.)