Parturition Flashcards
what is parturition
labour, delivery, birth
what does parturition reuire
dilation
what are braxton hicks contractions
weak spontaneous contraction during the second to third trimester
what is prodromal labour
consistent uncomfortable contractions without dilation, cervix softening under influence of relaxin, mucous plug expelled
what are the triggers of parturition
high oestrogen
oxytocin
corticotrphin
inflammation
what is oxytocin
powerful muscle stimulant
what is the progression of parturition
contractions brgin at labour onset
driven by oxytocin secretion
stops once delivery is over
what are breast composed of
mainly adipose tissue with basic duct system
what do lactiferous ducts carry
secretions to the outside
how do the breasts develop for lactation
elevated placental oestrogen and progesterone promote development of ducts and alveoli in mammary glands
during first months of pregnancy
prolactin - prevents lactation
how is lactation stimulated
suckling
what are the triggers that release oxytocin
myoepithelium to squeeze secreted milk through ducts
what are the triggers that release prolactin
stimulates synthesis of enzymes for milk production by alveolar epithelial cells
stimulates secretion of more milk to replace ejected when baby nurse