Womens health Flashcards
Obstetrics and Gynecology
When is a fetus at term
37-42 weeks
what is a fetus called when it passes 42 weeks
post mature
what are the four stages of labour
- Latent phase
- First stage
- Second stage
- Third stage
what occurs in the latent phase of labour
intermittent/irregular contractions
the cervix begins to dilate up to 4cm
how long can the latent phase of labour last
days
what occurs in the first stage of labour
regular strong contractions
cervix fully dilates up to 10 cm
what occurs in the second stage of labour
full dilation of the cervix to the birth of the child
what occurs in the third stage of labour
the birth of the baby to the birth of the placenta
what is syntocin given for
it is a synthetic hormone given to increase contractions and move on labour
at what labour stage is there a risk of hypoxia to the fetus
the second stage (pushing)
what does oxytocin do during labour
it surges causing the onset of labour stimulating the ripening of the cervix and causes contractions of the uterus
what do prostaglandins do in labour
they cause cervical ripening
what does oestrogen do during labour
there is a surge at the beginning of labour that inhibits progesterone
what does prolactin do during labour
it initiates milk production
what do beta endorphins do during labour
they act as a natural pain relief for the mother (build up during the latent stage of labour)
what is the most common presentation of the foetus during labour
cephalic - head down and longitudinal
what are the different presentations foetus’ can be in during labour
cephalic
breech - bottom down or feet down
transverse
what can increase the chance of a foetus being breech
- not enough amniotic fluid: not mobile enough
- having too much amniotic fluid: too mobile
- fibroids
- history of a breech labour
where in the uterus do contractions start
in the fundus
what is cervical effacement
it is the thinning and shortening of the cervix.
this process occurs so that dilation can begin
what are the 4 different types of female pelvis
gynecoid
platypelloid
android
anthropoid
what are the mechanisms of labour
descent
flexion
internal rotation
extension
restitution
external rotation
delivery of the body
mechanisms of labour - what occurs during descent
the fetus descends into the pelvis
mechanisms of labour - what occurs during flexion
as the fetus descends through the pelvis contractions put pressure on the fetal spine towards the occiput of the womans pelvis
when this happens the fetal neck flexes allowing the circumference of the fetal head to reduce