lactation       
noun [ U ]  biology specialized uk/lækˈteɪ.ʃən/ us/lækˈteɪ.ʃən/
 泌乳
the process in which a woman or female animal produces milk
  The breasts contain a number of specialized cell types that work together to allow lactation.  乳房含有一些特殊的细胞类型,共同作用产生乳汁。 
 Eating too little shortens the lactation period. 进食太少会缩短泌乳期。 
 See: lactate
 - More examples
 - Lactation is known to help prevent ovulation.
 - The hormone sustains lactation by stimulating cows' appetites so they eat more.
 - You shouldn't cut calories before your baby is 6 weeks old, when lactation is well established.