The onset of labor prior to the completion of 37 weeks of gestation is called:

BTSC Staff Nurse 1 August-2025

Obstetrics & Gynaecology

Easy

Appeared in: BTSC Staff Nurse 1 August-2025

Explanation

Pre-term labor is defined as the presence of regular uterine contractions that cause cervical changes (dilation and effacement) occurring before 37 completed weeks of gestation.
This condition is a significant cause of perinatal morbidity and mortality, as it often leads to pre-term birth.
The gestational age cutoff of 37 weeks is the key defining factor for this term.

Option B: Precipitate labor refers to the duration of labor, not its timing in relation to gestational age. It is an extremely rapid labor that lasts less than 3 hours.
Option C: Prolonged labor, like precipitate labor, is defined by its duration. It refers to labor that extends beyond the expected time frames, not labor that starts early.
Option D: Pre-labor rupture of membranes (PROM) describes the event of the amniotic sac breaking before labor begins. This can happen at any gestational age, including at term (after 37 weeks) or pre-term (before 37 weeks, which is then called PPROM). The defining feature is the timing of rupture relative to labor onset, not the gestational age itself.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definitions of Labor Complications as background academic context rather than a clinical decision trigger.
Nurses play a critical role in identifying the signs of pre-term labor, such as regular contractions, pelvic pressure, and changes in vaginal discharge. Early identification allows for interventions like administration of tocolytics to stop or slow labor and corticosteroids to promote fetal lung maturity.
Patient education is vital. Nurses must teach at-risk pregnant women the symptoms of pre-term labor and the importance of seeking immediate medical attention.
What if? - If a patient's water breaks at 35 weeks but she is not having contractions, the diagnosis would be Pre-term Prelabor Rupture of Membranes (PPROM). This is managed differently than active pre-term labor, with a focus on preventing infection and monitoring fetal well-being, often leading to induction of labor.

How to Approach the Question

First, identify the key terms in the question: "onset of labor" and "prior to the completion of 37 weeks of gestation".
This is a definition-based recall question. The goal is to match the definition in the stem to the correct medical term among the options.
Analyze the prefix 'pre-term'. 'Pre' means before, and 'term' refers to the full duration of pregnancy (37-42 weeks). Therefore, 'pre-term' logically means before full term.
Evaluate the other options. 'Precipitate' and 'prolonged' relate to the speed or duration of labor, not its timing in gestation.
'Pre-labor rupture of membranes' describes the water breaking before labor starts, which is a different event from the onset of labor itself and can occur at any gestational age.

Concept Tested & Keywords

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E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 33-41

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 463-465

E6 Obstetrics Williams p. 33-53