which of the following in not a correct statement about umbilical cord ?

Options

A. It connects the placenta to the embryo
B. It helps in the transport of substances to and from the embryo
C. It priduces several hormones like hPL ,estrogen and progesterone
D. It has 100% foetal blood

Answer

### Step-by-Step Solution:

1. **Understanding the Umbilical Cord**: The umbilical cord is a vital structure that connects the developing fetus to the placenta. It facilitates the exchange of nutrients, gases, and waste products between the mother and the fetus.

2. **Analyzing the Statements**:
- **Statement 1**: "It connects the placenta to the embryo."
- This statement is correct. The umbilical cord indeed connects the placenta to the embryo.

- **Statement 2**: "It helps in the transport of substances to and from the embryo."
- This statement is also correct. The umbilical cord plays a crucial role in transporting nutrients and waste between the mother and the embryo.

- **Statement 3**: "It provides several hormones like HPL, estrogen, and progesterone."
- This statement is incorrect. The hormones HPL (Human Placental Lactogen), estrogen, and progesterone are produced by the placenta, not the umbilical cord itself.

- **Statement 4**: "It has 100% fetal blood."
- This statement is misleading. While the umbilical cord contains fetal blood, it does not have 100% fetal blood due to the need to prevent mixing of oxygenated and deoxygenated blood.

3. **Identifying the Incorrect Statement**: Based on the analysis, the third statement is not correct as it attributes hormone production to the umbilical cord instead of the placenta.

4. **Conclusion**: The statement that is not correct about the umbilical cord is the one that claims it provides several hormones like HPL, estrogen, and progesterone.

### Final Answer:
The statement that is not correct about the umbilical cord is: "It provides several hormones like HPL, estrogen, and progesterone."

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