normal labour and puerperium Flashcards
which hormone prevents uterine contractility?
progesterone
it hinders contracility of myocytes and prevents?
gap junctions forming
eostrogen makes uterus contract and also promotes?
prstaglandin production
what hormone initiates and sustains contractions an facts on decidua tissue to promote prostaglandin release?
oxytocin
where is oxytocin synthesised?
directly in decidual tissue and extra embryonic metal tissues, and in placenta
what is fergusons reflex
mechanical stretch of cervix and stripping of metal membranes increases excitability of myometrial fibres
a rise in fetal cortisol level stimulates an increase in what in the mother?
oestriol
increase in myometrial oxytocin receptors and their activation results in phospholipase c activity and subsequent increase in cytosolic calcium, and uterine contractility
y
oestroge causes an incrase in the number of oxytocin receptors in myometrial and decidual tissue ear the end of pregnancy
y