Gestation is a period ________.

Options

A. starting from fertilization of an egg till the birth of a child
B. in which a sperm and an ovum fuse together to form a zygote
C. in which an egg is released from either ovary into the fallopian tube
D. in which the zygote undergoes drastic changes in the first four weeks of pregnancy

Answer

**Step-by-Step Solution:**

1. **Understanding Gestation**: The term "gestation" refers to the period during which an embryo develops in the womb. It is commonly associated with pregnancy.

2. **Duration of Gestation**: In humans, the gestation period lasts for approximately 9 months. This is the time from conception until the birth of the baby.

3. **Stages of Gestation**: The gestation period begins with the fertilization of an egg by a sperm, leading to the formation of a zygote. This zygote then undergoes several stages of development, including cell division and the formation of an embryo.

4. **Completion of Gestation**: The gestation period ends with the birth of the child, marking the transition from the embryo stage to a fully developed baby.

5. **Conclusion**: Therefore, gestation is the period from the fertilization of an egg until the birth of the child.

**Final Answer**: Gestation is a period from fertilization of an egg until the birth of the child.

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