不同泌乳期
different lactation stages
different lactation
全期泌乳量
Milk yield of a lactation
早期泌乳性状
Earlier stage milk characters
妊娠哺乳期乳腺癌
pregnancy-associated breast cancer
古生代中期－中生代早期
middle paleozoic early mesozoic
不孕非泌乳奶牛
Non-prognant nonmilking dairy cow
产后泌乳障碍综合征
postpartum dysgalactiae syndrome
垂体泌乳素
Pituitary gland prolactin
Prolactin
PRL