In pregnant woman having prolonged labour pains, if the childbirth has to be hastened, it is advisable to administer a hormone that can

Options

A. activate the smooth muscles
B. increase the metabolic rate
C. release glucose into the blood
D. stimulate the ovary

Answer

### Step-by-Step Solution:

1. **Understanding the Problem**: The question states that a pregnant woman is experiencing prolonged labor pains, and there is a need to hasten childbirth.

2. **Identifying the Relevant Hormones**: We need to consider hormones that can influence labor and childbirth. The options provided are:
- Activate the smooth muscle
- Increase the metabolic rate
- Release glucose into the blood
- Stimulate the ovary

3. **Analyzing Each Option**:
- **Activate the Smooth Muscle**: This is related to the contraction of the uterus, which is crucial during labor.
- **Increase the Metabolic Rate**: This is associated with thyroxin, which regulates metabolism but does not directly affect labor.
- **Release Glucose into the Blood**: This is related to glucagon, which breaks down glycogen into glucose, not directly related to labor.
- **Stimulate the Ovary**: This refers to gonadotropins, which stimulate egg production but are not involved in labor.

4. **Selecting the Correct Hormone**: The hormone that activates smooth muscle contraction is **oxytocin**. This hormone is crucial during childbirth as it stimulates uterine contractions, helping to facilitate the delivery process.

5. **Conclusion**: To hasten childbirth in a woman experiencing prolonged labor pains, it is advisable to administer **oxytocin**, as it activates the smooth muscles of the uterus, promoting contractions.