Implantation takes place after ______of fertilisation.

Options

A. 5 days
B. 6 days
C. 7 days
D. 8 days

Explanation

**Step-by-Step Solution:**

1. **Understanding Implantation**: Implantation is defined as the process of embedding the blastocyst (the early stage of the embryo) into the endometrium, which is the inner lining of the uterus.

2. **Timing of Implantation**: Implantation begins approximately 7 days after fertilization. This is the time required for the zygote to undergo successive mitotic divisions to form a blastocyst.

3. **Duration of Implantation**: The process of implantation takes about 3 days to complete. Therefore, while implantation starts around the 7th day after fertilization, it continues for a few days.

4. **Conclusion**: Based on the information, we can conclude that implantation takes place after 7 days of fertilization.

5. **Final Answer**: The correct answer is that implantation takes place after **7 days** of fertilization.

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