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Labor and birth are affected by the five Ps: - ✔✔-passenger, passageway, powers, position of the
woman, and psychologic response.
The first stage of labor lasts from - ✔✔-The time dilation begins to the time when the cervix is fully
dilated.
The second stage of labor lasts from - ✔✔-The time of full cervical dilation to the birth of the infant.
The third stage of labor lasts from - ✔✔-The infant's birth to the expulsion of the placenta.
The fourth stage of labor - ✔✔-Is the first 2 hours after birth.
The cardinal movements of the mechanism of labor are - ✔✔-engagement, descent, flexion, internal
rotation, extension, restitution and external rotation, and expulsion of the infant.
A primigravida asks the nurse about signs she can look for that would indicate that the onset of labor is
getting closer. The nurse should describe:
A) weight gain of 1 to 3 lbs.
B) quickening.
C) fatigue and lethargy.
D) bloody show. - ✔✔-D) Bloody show
Women usually experience a weight loss of 1 to 3 lbs. Quickening is the perception of fetal movement
by the mother, which occurs at 16 to 20 weeks of gestation. Women usually experience a burst of
energy or the nesting instinct. Passage of the mucous plug (operculum) also termed pink/bloody show
occurs as the cervix ripens.
,The nurse should tell a primigravida that the definitive sign indicating that labor has begun would be:
A) progressive uterine contractions with cervical change.
B) lightening.
C) rupture of membranes.
D) passage of the mucous plug (operculum). - ✔✔-A) progressive uterine contractions with cervical
change.
Regular, progressive uterine contractions that increase in intensity and frequency are the definitive sign
of true labor along with cervical change. Lightening is a premonitory sign indicating that the onset of
labor is getting closer. Rupture of membranes usually occurs during labor itself. Passage of the mucous
plug is a premonitory sign indicating that the onset of labor is getting closer
On completion of a vaginal examination on a laboring woman, the nurse records: 50%, 6 cm, -1. What is
a correct interpretation of the data?
A) The fetal presenting part is 1 cm above the ischial spines.
B) Effacement is 4 cm from completion.
C) Dilation is 50% completed.
D) The fetus has achieved passage through the ischial spines. - ✔✔-A) The fetal presenting part is 1 cm
above the ischial spines.
Station of -1 indicates that the fetal presenting part is above the ischial spines and has not yet passed
through the pelvic inlet. Progress of effacement is referred to by percentages, with 100% indicating full
effacement and dilation by centimeters, with 10 cm indicating full dilation. Progress of effacement is
referred to by percentages, with 100% indicating full effacement and dilation by centimeters, with 10
cm indicating full dilation. Passage through the ischial spines with internal rotation would be indicated
by a plus station such as +1.
In order to accurately assess the health of the mother accurately during labor, the nurse should be
aware that:
A) The woman's blood pressure increases during contractions and falls back to prelabor normal between
contractions.
B) Use of the Valsalva maneuver is encouraged during the second stage of labor to relieve fetal hypoxia.
C) Having the woman point her toes reduces leg cramps.
D) The endogenous endorphins released during labor raise the woman's pain threshold and produce
sedation. - ✔✔-D) The endogenous endorphins released during labor raise the woman's pain threshold
and produce sedation.
,Blood pressure increases during contractions but remains somewhat elevated between them. Use of the
Valsalva maneuver is discouraged during second stage labor because of a number of potentially
unhealthy outcomes, including fetal hypoxia. Pointing the toes can cause leg cramps, as can the process
of labor itself. In addition, physiologic anesthesia of the perineal tissues, caused by the pressure of the
presenting part, decreases the mother's perception of pain.
The nurse knows that the second stage of labor, the descent phase, has begun when:
A) the amniotic membranes rupture.
B) the cervix cannot be felt during a vaginal examination.
C) the woman experiences a strong urge to bear down.
D) the presenting part is below the ischial spines. - ✔✔-C) the woman experiences a strong urge to bear
down.
Rupture of membranes has no significance in determining the stage of labor. The second stage of labor
begins with full cervical dilation. During the descent phase of the second stage of labor, the woman may
experience an increase in the urge to bear down. Many women may have an urge to bear down when
the presenting part is below the level of the ischial spines. This can occur during the first stage of labor,
as early as 5 cm of dilation.
Nurses can help their clients by keeping them informed about the distinctive stages of labor. What
description of the phases of the first stage of labor is accurate?
A) Latent: mild, regular contractions; no dilation; bloody show; duration of 2 to 4 hours
B) Active: moderate, regular contractions; 4 to 7 cm dilation; duration of 3 to 6 hours
C) Lull: no contractions; dilation stable; duration of 20 to 60 minutes
D) Transition: very strong but irregular contractions; 8 to 10 cm dilation; duration of 1 to 2 hours - ✔✔-
B) Active: moderate, regular contractions; 4 to 7 cm dilation; duration of 3 to 6 hours
The latent phase is characterized by mild to moderate, irregular contractions; dilation up to 3 cm;
brownish to pale pink mucus; and a duration of 6 to 8 hours. The active phase is characterized by
moderate, regular contractions; 4 to 7 cm dilation; and a duration of 3 to 6 hours. No official "lull" phase
exists in the first stage. The transition phase is characterized by strong to very strong, regular
contractions; 8 to 10 cm dilation; and a duration of 20 to 40 minutes.
Which position would the nurse suggest for second-stage labor if the pelvic outlet needs to be
increased?
A) Semirecumbent
, B) Sitting
C) Squatting
D) Side-lying - ✔✔-C) Squatting
A semirecumbent position does not assist in increasing the size of the pelvic outlet. Although sitting may
assist with fetal descent, this position does not increase the size of the pelvic outlet. Kneeling or
squatting moves the uterus forward and aligns the fetus with the pelvic inlet; this can facilitate the
second stage of labor by increasing the pelvic outlet. A side-lying position is unlikely to assist in
increasing the size of the pelvic outlet.
Concerning the third stage of labor, nurses should be aware that:
A) the placenta eventually detaches itself from a flaccid uterus B) the duration of the third stage may be
as short as 3 to 5 minutes
C) it is important that the dark, roughened maternal surface of the placenta appear before the shiny
fetal surface
D) the major risk for women during the third stage is a rapid heart rate - ✔✔-B) the duration of the third
stage may be as short as 3 to 5 minutes.
The placenta cannot detach itself from a flaccid (relaxed) uterus. The third stage of labor lasts from birth
of the fetus until the placenta is delivered. The duration may be as short as 3 to 5 minutes, although up
to 1 hour is considered within normal limits. Which surface of the placenta comes out first is not
clinically important. The major risk for women during the third stage of labor is postpartum hemorrhage.
The risk of hemorrhage increases as the length of the third stage increases.
The charge nurse on the maternity unit is orienting a new nurse to the unit and explains that the 5 Ps of
labor and birth are: (Select all that apply.)
A) passenger.
B) placenta.
C) passageway.
D) psychologic response.
E) powers.
F) position. - ✔✔-At least five factors affect the process of labor and birth. These are easily
remembered as the five Ps: passenger (fetus and placenta), passageway (birth canal), powers
(contractions), position of the mother, and psychologic response.