A client who is a primipara is completing admission forms at her first obstetrical clinic visit.
Which information shared is needed by the practical nurse (PN) to accurately assign an estimated date of birth (EDB)?
Last day of last normal menstrual period.
Average duration of menstrual periods.
Average frequency of menstrual periods.
First day of last normal menstrual period.
The Correct Answer is D
Choice A rationale
The last day of the last normal menstrual period would not accurately establish the estimated date of birth because calculations for gestational age commence from the onset of the cycle. Conception typically occurs around two weeks after the first day, so using the last day would lead to an underestimation of gestational age.
Choice B rationale
The average duration of menstrual periods, while providing insight into cycle regularity, does not offer the precise temporal marker needed for gestational age calculation. Nägele's rule specifically requires the first day of the last menstrual period, not the length of bleeding, to accurately estimate the delivery date.
Choice C rationale
The average frequency of menstrual periods, though indicating cycle regularity or irregularity, is not the specific data point required for estimating the delivery date. Nägele's rule relies on a fixed reference point, which is the beginning of the last menstrual cycle, not the intervals between cycles.
Choice D rationale
The first day of the last normal menstrual period (LMP) is crucial for accurately assigning an estimated date of birth (EDB) using Nägele's rule. This calculation adds 7 days to the LMP and subtracts 3 months, providing a standardized method for determining gestational age and anticipated delivery.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
An acceleration is a visually apparent abrupt increase in the fetal heart rate above the baseline. For a 38-week fetus, an acceleration is defined as an increase of 15 beats per minute or more above the baseline, lasting 15 seconds or more but less than 2 minutes. The given finding of 10 seconds does not meet this criterion.
Choice B rationale
While fetal movement often accompanies accelerations, documenting "fetal movement" alone is insufficient. The nonstress test specifically assesses the fetal heart rate response to movement, and the critical finding to document relates to the FHR pattern itself, not just the presence of movement.
Choice C rationale
A positive tracing in obstetrics typically refers to a positive contraction stress test, which indicates late decelerations and is an abnormal finding. This terminology is not applicable to a nonstress test, where the terms "reactive" or "nonreactive" are used to describe the findings.
Choice D rationale
A nonreactive pattern on a nonstress test for a 38-week fetus is defined by the absence of two or more accelerations (15 bpm above baseline for at least 15 seconds) within a 20-minute period. The observed FHR increases lasting only 10 seconds do not meet the duration criteria for reactivity.
Correct Answer is D
Explanation
Choice A rationale
Consumption of whole milk as a toddler is generally appropriate for growth and development, providing essential fats and nutrients. Unless consumed in excessive quantities or as part of an overall diet high in calories without sufficient physical activity, it is not typically identified as a primary singular contributor to early obesity.
Choice B rationale
Dedicated breastfeeding for 6 months is protective against childhood obesity. Breast milk provides optimal nutrition and growth-promoting factors, and breastfeeding is associated with better self-regulation of caloric intake by infants, potentially reducing the risk of later obesity compared to formula feeding.
Choice C rationale
Exclusive soy-based formula for the first year, while an alternative for specific dietary needs, does not inherently contribute to early obesity more than other formulas. The caloric density and nutritional composition of standard infant formulas are regulated and designed to support healthy growth, making it unlikely to be a primary cause of obesity.
Choice D rationale
Introducing solid foods, such as fortified cereal, before 4 months of age is associated with an increased risk of obesity. Infants lack the necessary gastrointestinal and renal maturity to process solids effectively before this age, and early introduction can lead to excessive caloric intake, disruption of feeding cues, and altered gut microbiome development, predisposing to weight gain.
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