Chapter 13 Flashcards
Relaxin
tissues relax causing the pelvis to relax
Contractions have two functions
dilate the cervix and push the baby out
At the end of pregnancy, what hormone is an increase
oxytocin receptors
what do prostaglandins lead to
additional contractions
Dilation
opening or enlargement of the external cervical os
Lightening
the fetal presenting part begins to descend into the true pelvis; the uterus lowers and moves into a more anterior position
Lightening decreases what symptoms? and increases what
decreases breathing difficulty, gastric reflux
increase in urination and vaginal discharge
Bloody show
mucous plug that fills the cervical canal is expelled
what is 34 0/7- 36 6/7
late preterm
Nesting
energy level increases usually occur 24-48 hours before labor begins
Braxton hicks contractions
Decreased by activity, voiding, eating, changing position, and increasing fluid intake.
if contractions last longer than 30sec and more then 4-6 times an hour call MD
PROM
prelabor rupture of membranes; labor usually begins within 24 hrs, the barrier to infection is gone, the danger of cord prolapse if engagement has not occurred
True labor
in the back, a regular contraction that doesn’t change with activity, become stronger, makes cervical changes
5 p’s are
passageway, passenger, powers, position, and psychological
Three names of true pelvis passageway
pelvic inlet, mid-pelvis, and pelvic outlet
Mid-pelvis does what
compresses chest causing lung fluid and mucus to be expelled
True pelvis lies
below linea terminals
Pelvic shape; Gynecoid
true female pelvis, vaginal birth most favorable, inlet round & outlet roomy, O
Anthropoid
common in men & nonwhite women 0
Android
male shaped pelvis, labor is poor, leads to c section, heart shaped
platypelloid
less common, c section required flat,
effacement
the cervix thins to allow presenting part to descend