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407 exam3.9
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20
Biology
Undergraduate 4
04/08/2014

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Term
, labor is triggered by
Definition
interplay between the fetus, the uterus, and the placenta.
Term
late preg changes of:
baby
Definition
roatation (lightening) and descent(=presure on cervix)
Term
late preg changes of:
mother
Definition
pelvis relax, labor pains, pushing
Term
late preg changes of:
uterus
Definition
increased sense to oxytocin
increasece prostaglandin
cervix thins and dilates
contraction
rupture amniotic sac
Term
late preg changes of:
placenta
Definition
aging placenta= decrease estrogen and progesterone
Term
Pre-labor Events – Lightening
Definition
cervical effacement- thins/shorter
dialates
Term
Most common (favorable) position of baby
Definition
head toward spine
Term
positions that need c section
Definition
breech= butt/feet first
transverse
Term
parturition
reflex
Definition
process of delivering baby and placenta
neuroendocrine
Term
The stretching of the cervix stimulates nerves, which signal
Definition
the posterior pituitary gland to release of oxytocin.
Term
Oxytocin causes the
Definition
uterine muscles (myometrium) to contract
1st stage of labor
Term
pitocin
Definition
doubles risk of c section
Term
First Stage of Labor
Definition
onset of contractions- cervix at 10cm
water breaks
6-24hrs (1st baby longer)
Term
second stage
Definition
fully dialated cervix- birth
pushing
Term
Risks and Benefits of Epidural Analgesia in Labor
Definition
safe and effective to remove pain
long labor, more interventions, c-section
Term
crowning
Definition
babies head is visible without sliping back
Term
episiotomy
Definition
incision btw perinemum
once routine, now not rec.
Term
third stage
Definition
placenta birth
once baby is born oxytocin slows, but uterus still needes to contract so nursing after delivery can stimulate oxytocin to continue the placneta birth
Term
1965 C section rate
2010 rate
Definition
4.5%
33%
Term
Reasons that contribute to the high cesarean rate
Definition
Lack of support during labor and adherence to strict standards (duration of labor, position of baby, size of baby, etc).
Use of continuous fetal monitoring
Consequence of common labor interventions such as labor induction (23%) and epidural early in labor
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