How much weight gain is a sign of preeclampsia?

Hariyana-CHO-2021

Obstetrics & Gynaecology

Easy

Appeared in: Hariyana-CHO-2021

Explanation

A sudden weight gain of 3-5 pounds (1.4 to 2.3 kg) in a single week is a key warning sign of preeclampsia.
This rapid increase is not due to fat deposition but rather to pathological fluid retention (edema), a hallmark of the condition.
This rate is significantly higher than the normal weight gain of approximately 1 pound (0.45 kg) per week expected in the second and third trimesters.
Source SRC_10004 notes that excessive weight gain (more than 3 kg in a month, which is over 1.5 lbs/week) should raise suspicion of pre-eclampsia.

Option B: This represents an extremely large and rapid weight gain (6.6 to 11 pounds per week). While it would certainly be a cause for alarm, the range of 3-5 pounds per week is the more commonly cited clinical warning sign.
Option C: A weight gain of 3-5 pounds per month is consistent with the normal rate of weight gain during the second and third trimesters (approximately 1 pound per week).
Option D: This rate of weight gain is too low for an entire trimester (13 weeks). It would be a concern for inadequate maternal nutrition and potential fetal growth restriction.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Recognition of abnormal weight gain as a clinical sign of preeclampsia as background academic context rather than a clinical decision trigger.
Nurses must educate pregnant patients to monitor for and immediately report sudden weight gain, especially when accompanied by other signs like swelling of the face/hands, severe headaches, or vision changes.
Accurate weekly weight measurement is a crucial component of routine antenatal care to screen for preeclampsia and assess fluid status.
What if? If a patient reports a 4-pound weight gain over a month, the nurse should recognize this as within the normal range and continue routine monitoring. In contrast, a 4-pound gain in one week requires urgent assessment for preeclampsia, including a blood pressure check and urine protein test.

How to Approach the Question

First, identify the core concept of the question, which is recognizing a key sign of preeclampsia.
Recall the pathophysiology of preeclampsia, particularly that it involves widespread endothelial dysfunction leading to increased capillary permeability and fluid leakage into tissues (edema).
Understand that this pathological fluid retention manifests as a rapid and sudden increase in weight.
Evaluate the timeframes given in the options: per week, per month, or per trimester. A sign of an acute process like preeclampsia will be most evident over a short timeframe, such as a week.
Compare the weight values in the options to the normal expected rate of weight gain in pregnancy, which is about 1 pound per week in the latter half. A gain of 3-5 pounds in one week is a significant deviation and a classic warning sign.

Concept Tested & Keywords

Concept Tested: Recognition of abnormal weight gain as a clinical sign of preeclampsia.
Stem keywords: weight gain, sign, preeclampsia
Lead-in keywords: How much
Negative lead-in flag: false

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 19-21

E6 Obstetrics Williams p. 78-92