Obs & gynae

Question 1

define Lactogenesis I, II, and III

Answer 1

•Lactogenesis I – differentiation of
alveolar epithelial cells into lactocytes
that secrete colostrum, with ~100mL
available to infant on day one postpartum

•Lactogenesis II – onset of copious milk
secretion occurring between 32 and 96
hours postpartum

•Lactogenesis III – maintenance of milk
production

Question 2

hormones of milk production?

Answer 2

ductal growth – estrogen, growth
hormone

alveolar development – progesterone,
prolactin, placental lactogen

lactogenesis II – withdrawal of
progesterone in the presence of high
circulating levels of prolactin

plus
Oxytocin – cause milk ejection, analgesia, uterine contractions, attachment