The maternity nurse understands that as the uterus contracts during labor, maternal-fetal exchange of oxygen and waste products:

Is not significantly affected.

Increases as blood pressure decreases.

Continues except when placental functions are occluded.

Diminishes as the spiral arteries are compressed.

Answer and Explanation

The Correct Answer is D

Choice A rationale
The maternal-fetal exchange of oxygen and waste products is affected by uterine contractions, as these compress the placental blood vessels, temporarily reducing blood flow.
Choice B rationale
Blood pressure variations during labor can influence perfusion but do not increase maternal-fetal exchange as uterine contractions primarily cause transient vascular compression.
Choice C rationale
Maternal-fetal exchange continues during contractions except when the uterine pressure is high enough to occlude placental blood flow, temporarily halting the exchange.
Choice D rationale
Uterine contractions compress the spiral arteries, reducing blood flow through the placenta, thereby diminishing maternal-fetal exchange of oxygen and waste products during contractions.

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Correct Answer is B

Explanation

Choice A rationale
Calculating from the LMP of February 14, 2019, the estimated date of birth using Naegele's rule would not fall in September.
Choice B rationale

Using Naegele's rule, adding 7 days to February 14 results in February 21, 2019, then subtracting 3 months, results in November 2019.
Choice C rationale
Naegele's rule calculates EDB by adding 7 days to the LMP and then subtracting 3 months. This does not lead to a November date.
Choice D rationale
While close, November 7 is not accurate. Naegele's rule would adjust from February 14, giving an EDB in mid to late November.

A. Valsalva maneuver. B. Ferguson’s reflex. C. Lightening. D. Molding.

Correct Answer is D

Explanation

Choice A rationale
Valsalva maneuver involves forced expiration against a closed airway, increasing intrathoracic pressure and commonly used to expel the fetus during the second stage of labor.
Choice B rationale
Ferguson’s reflex involves the release of oxytocin due to vaginal and cervical stretching, leading to stronger contractions during the second stage of labor.
Choice C rationale
Lightening refers to the descent of the fetus into the pelvis before labor begins, reducing pressure on the diaphragm and making breathing easier.
Choice D rationale
Molding is the slight overlapping of cranial bones, allowing the fetal head to change shape and fit through the birth canal during labor.

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The maternity nurse understands that as the uterus contracts during labor, maternal-fetal exchange of oxygen and waste products:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A woman arrives at the clinic for a pregnancy test. Her last menstrual period (LMP) was February 14, 2019. What is the client’s expected date of birth (EDB)?

Correct Answer is B

Explanation

The slight overlapping of cranial bones or shaping of the fetal head during labor is called:

Correct Answer is D

Explanation

Which of the following findings on fetal monitor tracing would be of most concern to the nurse?

A woman in labor has just received an epidural block. The most important nursing intervention is to:

A woman who is 14 weeks pregnant tells the nurse that she always had a glass of wine with dinner before she became pregnant. She has abstained during her first trimester and would like to know if it is safe for her to have a drink with dinner now. The nurse would tell her:

The nurse is caring for a laboring woman, G3 P2, who was examined 15 minutes ago. Her cervix was 8 cm dilated and 90% effaced. She now states she is feeling strong pressure in her rectum and wants to move her bowels. Which of the following action should the nurse perform first?

A woman attends a prenatal visit and is told to start taking a folic acid supplement. The Nurse Practitioner explains that this is to prevent:

After the nurse completes nutritional counseling for a pregnant woman, she asks the client to repeat the instructions to assess the client’s understanding. Which statement indicates that the client understands the role of protein in her pregnancy?