What is the cause of early decelerations in the fetal heart rate (FHR) of a laboring woman?
Cerebral compression
Cord compression
Uteroplacental insufficiency
Spontaneous rupture of membranes
The Correct Answer is A
Choice A reason: Cerebral compression is the cause of early decelerations, as it reflects the fetal head compression during uterine contractions. Early decelerations are decreases in the FHR that begin and end with the onset and end of a contraction, respectively. They are symmetrical and mirror the shape of the contraction. Early decelerations are normal and benign, as they indicate that the fetus is responding to the increased intracranial pressure and maintaining adequate oxygenation.
Choice B reason: Cord compression is not the cause of early decelerations but of variable decelerations. Variable decelerations are abrupt and irregular decreases in the FHR that vary in onset, duration, and depth. They are usually caused by the umbilical cord being compressed or occluded by the fetal body, the maternal pelvis, or the uterine contractions. Variable decelerations can indicate fetal distress or hypoxia, especially if they are severe, frequent, or prolonged.
Choice C reason: Uteroplacental insufficiency is not the cause of early decelerations, but of late decelerations. Late decelerations are decreases in the FHR that begin after the peak of a contraction and return to the baseline after the contraction ends. They are symmetrical and have a gradual onset and recovery. They are usually caused by the reduced blood flow and oxygen delivery to the placenta and the fetus due to maternal or fetal factors. Late decelerations can indicate fetal distress or hypoxia, and require immediate intervention.
Choice D reason: Spontaneous rupture of membranes is not the cause of early decelerations, but it can be a risk factor for cord compression and variable decelerations. Spontaneous rupture of membranes is the breaking of the amniotic sac and the release of the amniotic fluid, which usually occurs during labor or shortly before it. Spontaneous rupture of membranes can cause the umbilical cord to prolapse or slip into the vagina, where it can be compressed or kinked by the fetal head or the contractions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Progesterone is the hormone that stimulates the development of the alveoli and lobules of the mammary glands during pregnancy. It prepares the breasts for lactation by increasing the number and size of the milk-producing cells.
Choice B reason: Testosterone is the main male sex hormone that is responsible for the development of male reproductive organs and secondary sex characteristics. It has no direct role in the maturation of mammary gland tissue.
Choice C reason: Prolactin is the hormone that initiates and maintains milk production after childbirth. It is secreted by the anterior pituitary gland in response to suckling or nipple stimulation. It does not affect the maturation of mammary gland tissue.
Choice D reason: Estrogen is the hormone that stimulates the growth of the duct system of the mammary glands during puberty and pregnancy. It also promotes the development of female reproductive organs and secondary sex characteristics. It does not affect the maturation of mammary gland tissue.
Correct Answer is ["B","C","D"]
Explanation
Choice A reason: Abstinence is the avoidance of sexual activity, which reduces the risk of exposure to STIs. It is not a sexual risk behavior.
Choice B reason: Multiple sex partners increases the likelihood of exposure to STIs, especially if the partners are not tested or treated. It is a sexual risk behavior.
Choice C reason: Unprotected anal intercourse exposes the mucous membranes of the rectum and anus to potential pathogens, which can cause STIs such as gonorrhea, chlamydia, syphilis, and HIV. It is a sexual risk behavior.
Choice D reason: Oral sex involves contact between the mouth and the genitals or anus, which can transmit STIs such as herpes, HPV, gonorrhea, and syphilis. It is a sexual risk behavior.
Choice E reason: Dry kissing is the contact between the lips without the exchange of saliva, which does not transmit STIs. It is not a sexual risk behavior.
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