**Core Concept**
Labour is termed as precipitate if it occurs rapidly, usually within 2 hours of the onset of true labour in a primigravida, or within 1 hour in a multigravida. This definition highlights the importance of understanding the normal progression of labour, which is crucial for identifying and managing potential complications.

**Why the Correct Answer is Right**
A precipitate labour is characterized by a rapid onset and progression, often with inadequate cervical dilatation and fetal head descent. This can lead to complications such as fetal distress, umbilical cord prolapse, and postpartum hemorrhage. The American College of Obstetricians and Gynecologists (ACOG) defines precipitate labour as labour that progresses faster than expected, with a cervical dilatation of 5 cm or more within 2 hours in a primigravida or 1 hour in a multigravida.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a time frame for the onset of labour, which is a critical factor in defining precipitate labour.
* **Option B:** This option is incorrect because it does not provide a clear definition of precipitate labour and may be misleading.
* **Option C:** This option is incorrect because it does not specify the time frame for the onset of labour and may not accurately reflect the definition of precipitate labour.

**Clinical Pearl / High-Yield Fact**
A precipitate labour can be managed by administering oxytocin to augment uterine contractions and by providing close fetal monitoring to prevent complications. It is essential for healthcare providers to recognize the early signs of precipitate labour and take prompt action to prevent adverse outcomes.

**Correct Answer: C. Labour that progresses faster than expected, with a cervical dilatation of 5 cm or more within 1 hour in a multigravida or 2 hours in a primigravida.**