1. Factors Affecting Labor and Delivery Process

Topics: Childbirth, Uterus, Pelvis Pages: 3 (458 words) Published: July 22, 2013
1.FACTORS AFFECTING LABOR AND DELIVERY PROCESS

LABOR– a coordinated sequence of involuntary uterine contractions that results in effacement and dilatation of the cervix and voluntary bearing down efforts that result in birth. •The process of moving the fetus, placenta, and membranes out of the uterus and through the birth canal. •DELIVERY-the actual expulsion of the products of conception (fetus and placenta). •Uterus sinks downward and forward about 2 weeks before term, into the true pelvis. • Low persistent backache or sacroiliac distress.

Strong, frequent, but irregular contractions.
Vaginal mucous increases.
Weight loss, burst of energy, NVD.
FACTORS AFFECTING LABOR-the 5 Ps of Labor
Passenger
Passageway
Powers
Position
Psychological response
PASSENGER-THE FETUS
Interacting considerations:
size of fetal head
fetal lie
fetal attitude
fetal presentation
fetal position
FETAL LIE
Relation of long axis of fetus to the long axis of mother Spine-to-spine
Usually longitudinal/vertical
Can be transverse, as in shoulder presentation
FETAL ATTITUDE
Relationship of fetal body parts to one another.
The fetus assumes a characteristic posture in utero partly because of growth and partly because of the way the fetus conforms to the shape of the uterine cavity.  Usually a flexed attitude, chin on chest, arms and legs flexed, cord between arms and legs. FETAL PRESENTATION

What part “presents” first into the pelvic inlet and leads the way to delivery  Cephalic [or “Vertex”] (head first)
Breech (buttocks first)
Shoulder (only in 1%)
Presenting part is the part felt by an examining finger during a vag exam.

FETAL POSITION
Relationship of the presenting part (occiput, sacrum, mentum, sinciput) to the four quadrants of the mother’s pelvis. PASSAGEWAY
“Birth Canal” – pelvis, soft tissues of the cervix, pelvic floor (muscles), vagina, introitus (opening). The size and shape is...
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