Fertilization in humans is practically feasible only if

Options

A. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube
B. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
C. the sperms are transported into cervix within 48 hrs of release of ovum in uterus
D. the sperms are transported into vagina just after the release of ovum in fallopian tube.

Explanation

**Step-by-Step Solution:**

1. **Understanding Fertilization**: Fertilization in humans refers to the fusion of male and female gametes, which are the sperm and ovum, respectively.

2. **Anatomy Involved**: The key anatomical structures involved in fertilization are the ovaries, fallopian tubes, and uterus. The ovary releases an ovum (egg), which then travels into the fallopian tube.

3. **Pathway of the Ovum**: After ovulation, the ovum is picked up by the fimbriae of the fallopian tube and moves towards the ampulla, which is the widest part of the tube.

4. **Pathway of the Sperm**: Sperm are deposited in the vagina during intercourse and must swim through the cervix and uterus to reach the fallopian tubes.

5. **Simultaneous Transport**: For fertilization to occur, it is essential that both the sperm and the ovum arrive at the ampullary-isthmic junction of the fallopian tube at the same time. This is where fertilization typically occurs.

6. **Conclusion**: Therefore, fertilization in humans is practically feasible only if the ovum and sperm are transported simultaneously to the ampullary-isthmic junction of the fallopian tube.

**Final Answer**: Fertilization in humans is practically feasible only if the ovum and sperms are transported simultaneously to the ampullary-isthmic junction of the fallopian tube.

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