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)?
September 17, 2019.
November 21, 2019.
December 17, 2019.
November 7, 2019.
The Correct Answer is C
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
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 C 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 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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C"]
Explanation
Choice A rationale
Drugs, such as thalidomide and isotretinoin, are known teratogens that can cause congenital anomalies by interfering with the normal development of the embryo or fetus during critical periods.
Choice B rationale
Infections, such as rubella and cytomegalovirus, are known teratogens that can lead to congenital disorders by causing inflammation, cell damage, and disruption of normal fetal development.
Choice C rationale
Radiation exposure, particularly in high doses during critical periods of organogenesis, is a known teratogen that can result in congenital anomalies such as microcephaly, growth restriction, and intellectual disability.
Choice D rationale
Maternal genetic conditions are not considered teratogens. Teratogens are external agents that cause developmental abnormalities, whereas genetic conditions are inherited and involve genetic mutations or chromosomal abnormalities.
Correct Answer is D
Explanation
Choice A rationale
Placental insufficiency leads to late decelerations due to diminished blood flow, resulting in gradual decreases in fetal heart rate. This differs from the abrupt changes seen with cord compression.
Choice B rationale
Abruption manifests with symptoms such as painful bleeding and uterine tenderness, rather than specific heart rate patterns like those caused by cord compression.
Choice C rationale
Head compression produces early decelerations with a characteristic mirror image of contractions, unlike the abrupt heart rate drops seen with cord compression.
Choice D rationale
Cord compression results in variable decelerations, which are abrupt decreases in fetal heart rate due to intermittent reductions in oxygen supply. This matches the tracing pattern described.
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