The effects of progesterone on lactose synthesis activity and changes in mammary gland cells were studied in pseudopregnant rabbits simultaneously treated with prolactin. The injection of progesterone alone on Days 15 and 17 of pseudopregnancy decreased the activity of lactose synthetase (LSA) and galactosyl transferase (GTA), while the administration of prolactin for 2-4 days increased their ...

Fibroepithelial hyperplasia (FEH) of the mammary glands in cats (also known as fibroadenomatosis or feline mammary hyperplasia) was first described in 1973 (1). The syndrome involves the usually reversible, rapid, non-neoplastic enlargement of one or more mammary complexes (4) and is not uncommon in female cats. There is no milk production. Around 20% of all feline mammary masses are non-neopla...