Rate of cervical dilatation in primi during the active phase of labour is:
**Core Concept**
The active phase of labor is characterized by a rapid increase in cervical dilatation, which is essential for the safe and efficient delivery of a baby. In primiparous women, the active phase of labor is marked by a more rapid cervical dilatation compared to multiparous women.
**Why the Correct Answer is Right**
The rate of cervical dilatation in primiparous women during the active phase of labor is approximately 3-4 cm/hr. This is due to the stronger uterine contractions and the more favorable fetal head position, allowing for a more efficient labor process. The hormone oxytocin plays a crucial role in stimulating uterine contractions, which in turn facilitate cervical dilatation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is too slow for the active phase of labor. A cervical dilatation rate of 1-2 cm/hr is more typical of the latent phase of labor.
**Option B:** This option is incorrect because it is too rapid for the active phase of labor. A cervical dilatation rate of 5-6 cm/hr is not physiologically possible and may indicate an abnormal labor process.
**Option C:** This option is incorrect because it is not specific to primiparous women. The rate of cervical dilatation can vary significantly between primiparous and multiparous women.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the rate of cervical dilatation can be influenced by various factors, including the strength and frequency of uterine contractions, the size and position of the fetal head, and the presence of any underlying medical conditions. A healthcare provider should carefully monitor the labor process to ensure that it is progressing normally.
**Correct Answer: C. 3-4 cm/hr**