Presence of which of the following hormones in the urine confirms pregnancy?

Options

A. Progesterone
B. oestrogen
C. Human chorionic gonadotropin
D. prolactin

Answer

To answer the question regarding which hormone's presence in urine confirms pregnancy, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pregnancy Confirmation**:
- Pregnancy is typically confirmed through a pregnancy test kit that detects specific hormones in the urine.

2. **Identifying the Key Hormone**:
- The hormone that is primarily responsible for confirming pregnancy is Human Chorionic Gonadotropin (HCG).

3. **Source of HCG**:
- HCG is produced by the placenta shortly after implantation of the fertilized egg into the uterine lining.

4. **Timing of HCG Presence**:
- HCG can be detected in the urine after implantation occurs, which usually happens about 6 to 10 days after fertilization.

5. **Evaluating Other Hormones**:
- **Progesterone**: While it plays a crucial role in maintaining pregnancy, it is not the hormone detected in urine tests for confirming pregnancy.
- **Estrogen**: This hormone increases during ovulation and is not specifically indicative of pregnancy in urine tests.
- **Prolactin**: This hormone is involved in lactation and does not confirm pregnancy.

6. **Conclusion**:
- The presence of HCG in the urine is the definitive indicator of pregnancy. Therefore, the correct answer to the question is Human Chorionic Gonadotropin (HCG).

### Final Answer:
The presence of Human Chorionic Gonadotropin (HCG) in the urine confirms pregnancy.

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