RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
2025 nursing certification, maternal care
exam, RNC-OB test prep, verified OB
answers all INCUDED -pdf
In a normal singleton pregnancy with cephalic presentation, if the fundal height is palpated at 28 cm, the gestational
age is approximately
a. 22 weeks
b. 28 weeks
c. 32 weeks - ANS :B
The fundal height in centimeters approximately corresponds to the gestational age in weeks if gestation is between
1-36 weeks. After 36 weeks, the uterus begins to change shape as the body prepares for delivery and the fetal head
becomes engaged. At this time, the fundal height may even decrease or grow more slowly.
The effect that maternal administration of narcotics has on the fetal heart rate is
a. increase in baseline rates
b. transient sinusoidal fetal rate and increase in baseline rate
c. decreased variability and frequency of accelerations - ANS :C
TEST BANK 1
, RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
Medications that the mother receives may have an effect on the fetus. Some medications, such as butorphanol and
terbutaline, may increase the baseline rate. Other such as magnesium sulfate, may decrease the baseline rate but
these changes may be insignificant. Some drugs and substances used by the mother prior to labor (such as cocaine,
amphetamine, and nicotine) may result in fetal tachycardia and decreased variability.
The maternal serum screen should be done at
a. 15 to 20 weeks
b. 18 to 22 weeks
c. 20 to 26 weeks - ANS :A
The maternal serum test is a second trimester screening that is done between 15-20 weeks of gestation. Screening
tests include:
-First trimester: ultrasound at 8-12 weeks and noninvasive prenatal testing (NIPT) from 10 weeks, nuchal
translucency at 11.5-13.5 weeks, and chorionic villus sampling at 11-13 weeks.
-Second trimester: maternal screening test at 15-18 weeks, amniocentesis at 15-19 weeks, and ultrasound at 18-20
weeks.
A maternal serum screen that shows increased levels of human chorionic gonadotropin (hCG) and inhibin A and
decreased levels of unconjugated estriol (uE3) and alpha-fetoprotein (AFP) is an indication of
a. Down syndrome
b. spina bifida
c. Turner syndrome - ANS :A
The maternal screening test is done to screen for chromosomal abnormalities, and screens for three or four
substances: AFP, hCG, uE3, and sometimes inhibin A. A positive finding should be followed by further testing, such as
high-resolution ultrasound and/or amniocentesis, as well as analysis of chromosomes, so that the parents are able to
make informed decisions about the pregnancy.
In a nonstress test (NST) of a fetus at 34 weeks, a normal or reactive acceleration is at least
a. 10 bpm for 10 seconds
b. 15 bpm for 15 seconds
TEST BANK 2
, RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
c. 20 bpm for 20 seconds - ANS :B
This test measures the response of the fetal heart rate to fetal movement, so the test must be done when the fetus
is not in a sleep cycle. Accelerations usually do not occur until the fetal central nervous system is sufficiently mature,
usually at 30-32 weeks. At 30 weeks, a normal or reactive acceleration is at least 10 bpm for 10 seconds.
The amniotic fluid index (AFI) of the biophysical profile is important because it reflects
a. cardiovascular status
b. pulmonary status
c. renal perfusion - ANS :C
...indicating that shunting has not occurred and the kidneys are functioning adequately. A normal AFI is the finding of
a single vertical pocket of amniotic fluid at a volume of more than 2 cm (score 2), while an abnormal finding (score 0)
is a volume of less than 2 cm, indicating oligohydramnios. Normal volume per vertical pocket usually ranges from 5-
25 cm.
If an initial biophysical profile (BPP) score is 6/10 and a repeat is 4/10, the next appropriate action is to
a. deliver the fetus
b. repeat the BPP in 2 hours
c. wait and observe for 24 hours - ANS :A
...because a score of 4/10 indicates probable fetal asphyxia. A score of 6/10 indicates possible fetal asphyxia. If an
initial score is 6/10 and the repeat score is 6/10, birth should be induced. A normal BPP is a score of 2 for each of 5
parameters (fetal breathing movements, gross body movements, fetal tone, reactive fetal heart rate with NST, and
amniotic fluid volume), for a total of 10/10.
The vibroacoustic stimulation test (VST) is sometimes used in conjunction with
a. contraction stress test (CST)
b. ultrasound
c. nonstress test (NST) - ANS :C
TEST BANK 3
, RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
...because the fetus may be nonreactive during the NST if it is in a sleep cycle. During VST, sound and vibration are
applied to the maternal abdomen through a device that delivers 90 dB of sound for 1-3 seconds, stimulating
movement of the fetus so that the NST can be more adequately assessed. As an alternative, the NST may be
repeated at a later time when the fetus is more active.
A primigravida patient nearing term who complains of leg cramps, increased pelvic pressure, increased urinary
frequency, and peripheral edema is probably experiencing.
a. active labor
b. lightening
c. Braxton Hicks contractions - ANS :B
Lightening often occurs in first-time pregnancies about 2 weeks prior to onset of labor as the fetal presenting begins
to descend into the pelvis. This relieves pressure on the diaphragm, which decreases indigestion and shortness of
breath but increases pressure on the bladder and lower circulation, resulting in leg cramps, increased pelvic
pressure, increased urinary frequency, increased vaginal secretions, and peripheral edema. In multiparous women,
lightening may be delayed until onset of active labor.
If a patient's due date is April 3, the patient's pregnancy is considered postterm on
a. April 10
b. April 17
c. April 24 - ANS :A
....one week after the due date, assuming the due date was calculated correctly. Most designations of post-term
pregnancies result from inaccurate due date. Post-term pregnancies are more common with primigravidas than
multipara. Post-term pregnancies increase risk of stillbirth and neonatal mortality. About 1/4 of post-term
pregnancies are assoicated with macrosomia, common in infants of mothers with diabetes.
Bloody show is an indication of
a. extrusion of mucus from endocervical glands
b. placental separation
c. maternal bleeding because of alterations in coagulation - ANS :A
TEST BANK 4
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
2025 nursing certification, maternal care
exam, RNC-OB test prep, verified OB
answers all INCUDED -pdf
In a normal singleton pregnancy with cephalic presentation, if the fundal height is palpated at 28 cm, the gestational
age is approximately
a. 22 weeks
b. 28 weeks
c. 32 weeks - ANS :B
The fundal height in centimeters approximately corresponds to the gestational age in weeks if gestation is between
1-36 weeks. After 36 weeks, the uterus begins to change shape as the body prepares for delivery and the fetal head
becomes engaged. At this time, the fundal height may even decrease or grow more slowly.
The effect that maternal administration of narcotics has on the fetal heart rate is
a. increase in baseline rates
b. transient sinusoidal fetal rate and increase in baseline rate
c. decreased variability and frequency of accelerations - ANS :C
TEST BANK 1
, RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
Medications that the mother receives may have an effect on the fetus. Some medications, such as butorphanol and
terbutaline, may increase the baseline rate. Other such as magnesium sulfate, may decrease the baseline rate but
these changes may be insignificant. Some drugs and substances used by the mother prior to labor (such as cocaine,
amphetamine, and nicotine) may result in fetal tachycardia and decreased variability.
The maternal serum screen should be done at
a. 15 to 20 weeks
b. 18 to 22 weeks
c. 20 to 26 weeks - ANS :A
The maternal serum test is a second trimester screening that is done between 15-20 weeks of gestation. Screening
tests include:
-First trimester: ultrasound at 8-12 weeks and noninvasive prenatal testing (NIPT) from 10 weeks, nuchal
translucency at 11.5-13.5 weeks, and chorionic villus sampling at 11-13 weeks.
-Second trimester: maternal screening test at 15-18 weeks, amniocentesis at 15-19 weeks, and ultrasound at 18-20
weeks.
A maternal serum screen that shows increased levels of human chorionic gonadotropin (hCG) and inhibin A and
decreased levels of unconjugated estriol (uE3) and alpha-fetoprotein (AFP) is an indication of
a. Down syndrome
b. spina bifida
c. Turner syndrome - ANS :A
The maternal screening test is done to screen for chromosomal abnormalities, and screens for three or four
substances: AFP, hCG, uE3, and sometimes inhibin A. A positive finding should be followed by further testing, such as
high-resolution ultrasound and/or amniocentesis, as well as analysis of chromosomes, so that the parents are able to
make informed decisions about the pregnancy.
In a nonstress test (NST) of a fetus at 34 weeks, a normal or reactive acceleration is at least
a. 10 bpm for 10 seconds
b. 15 bpm for 15 seconds
TEST BANK 2
, RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
c. 20 bpm for 20 seconds - ANS :B
This test measures the response of the fetal heart rate to fetal movement, so the test must be done when the fetus
is not in a sleep cycle. Accelerations usually do not occur until the fetal central nervous system is sufficiently mature,
usually at 30-32 weeks. At 30 weeks, a normal or reactive acceleration is at least 10 bpm for 10 seconds.
The amniotic fluid index (AFI) of the biophysical profile is important because it reflects
a. cardiovascular status
b. pulmonary status
c. renal perfusion - ANS :C
...indicating that shunting has not occurred and the kidneys are functioning adequately. A normal AFI is the finding of
a single vertical pocket of amniotic fluid at a volume of more than 2 cm (score 2), while an abnormal finding (score 0)
is a volume of less than 2 cm, indicating oligohydramnios. Normal volume per vertical pocket usually ranges from 5-
25 cm.
If an initial biophysical profile (BPP) score is 6/10 and a repeat is 4/10, the next appropriate action is to
a. deliver the fetus
b. repeat the BPP in 2 hours
c. wait and observe for 24 hours - ANS :A
...because a score of 4/10 indicates probable fetal asphyxia. A score of 6/10 indicates possible fetal asphyxia. If an
initial score is 6/10 and the repeat score is 6/10, birth should be induced. A normal BPP is a score of 2 for each of 5
parameters (fetal breathing movements, gross body movements, fetal tone, reactive fetal heart rate with NST, and
amniotic fluid volume), for a total of 10/10.
The vibroacoustic stimulation test (VST) is sometimes used in conjunction with
a. contraction stress test (CST)
b. ultrasound
c. nonstress test (NST) - ANS :C
TEST BANK 3
, RNC-OB exam 2025, obstetric nursing
exam, RNC-OB questions and answers
withDetailed Rationales Graded A+,
...because the fetus may be nonreactive during the NST if it is in a sleep cycle. During VST, sound and vibration are
applied to the maternal abdomen through a device that delivers 90 dB of sound for 1-3 seconds, stimulating
movement of the fetus so that the NST can be more adequately assessed. As an alternative, the NST may be
repeated at a later time when the fetus is more active.
A primigravida patient nearing term who complains of leg cramps, increased pelvic pressure, increased urinary
frequency, and peripheral edema is probably experiencing.
a. active labor
b. lightening
c. Braxton Hicks contractions - ANS :B
Lightening often occurs in first-time pregnancies about 2 weeks prior to onset of labor as the fetal presenting begins
to descend into the pelvis. This relieves pressure on the diaphragm, which decreases indigestion and shortness of
breath but increases pressure on the bladder and lower circulation, resulting in leg cramps, increased pelvic
pressure, increased urinary frequency, increased vaginal secretions, and peripheral edema. In multiparous women,
lightening may be delayed until onset of active labor.
If a patient's due date is April 3, the patient's pregnancy is considered postterm on
a. April 10
b. April 17
c. April 24 - ANS :A
....one week after the due date, assuming the due date was calculated correctly. Most designations of post-term
pregnancies result from inaccurate due date. Post-term pregnancies are more common with primigravidas than
multipara. Post-term pregnancies increase risk of stillbirth and neonatal mortality. About 1/4 of post-term
pregnancies are assoicated with macrosomia, common in infants of mothers with diabetes.
Bloody show is an indication of
a. extrusion of mucus from endocervical glands
b. placental separation
c. maternal bleeding because of alterations in coagulation - ANS :A
TEST BANK 4
