The Roles Of Hormones In Partuition And Lactation

Question 1

Parturition step 1

Answer 1

Progesterone levels decrease allowing other hormones to affect uterine muscles

Question 2

Parturition step 2

Answer 2

Oestrogen and oxytocin levels increase which causes uterine contractions and cervical softening, parturition begins

Question 3

Parturition step 3

Answer 3

Relaxin is secreted by the ovaries, relaxes the the pelvic ligaments to open the birth control

Question 4

Parturition step 4

Answer 4

Oestrogen and progesterone levels drop and prolactin is secreted this triggers lactation

Question 5

Lactation

Answer 5

The production of milk by the females mammary system

-essential for the survival of offspring
-highly nutritious
-prolactin triggers the mammary gland to start milk production, oxytocin causes milk let-down (release)

Question 6

Parturition

Answer 6

The process of giving birth to young

Question 7

Milk let-down process

Answer 7

Nerve impulses caused by
-calf suckling
-sound of milk machine
-sight of calf
-release of oxytocin
-release of milk