Which of the following is a correct statement w.r.t. contraceptive methods?

Options

A. In conventional vasectomy, usually transabdominal surgery is done , in which fallopian tube is cut and cut eneds are tied
B. Tubectomy inhibitas fertilisation by blocking formation of ova in ovary
C. In coitus interruptus, coupls avoid from coitus from day 10 to 17 of the menstural cycle
D. Surgical intervention blocks gamete transport and thereby prevents conception

Answer

To determine the correct statement regarding contraceptive methods, we will evaluate each option provided in the question step by step.

### Step 1: Analyze the first option
The first option states that in conventional vasectomy, transabdominal surgery is performed where the fallopian tube is cut and the ends are tied.

- **Evaluation**: This statement is incorrect. In a vasectomy, the procedure involves cutting and tying the vas deferens in males, not the fallopian tubes. Cutting and tying the fallopian tubes is known as tubectomy, which is a procedure for females.

### Step 2: Analyze the second option
The second option claims that tubectomy inhibits fertilization by blocking the formation of ova in the ovary.

- **Evaluation**: This statement is also incorrect. Tubectomy does not block the formation of ova; it prevents the movement of the ova from the ovaries through the fallopian tubes. The ova are still produced in the ovaries, but they cannot reach the uterus for fertilization.

### Step 3: Analyze the third option
The third option states that in coitus interruptus, couples avoid coitus from day 10 to 17 of the menstrual cycle.

- **Evaluation**: This statement is incorrect. Coitus interruptus, also known as the withdrawal method, involves the male partner withdrawing his penis before ejaculation during intercourse, regardless of the menstrual cycle days. It does not involve avoiding intercourse during specific days.

### Step 4: Analyze the fourth option
The fourth option asserts that surgical interventions block gamete transport and thereby prevent conception.

- **Evaluation**: This statement is correct. Surgical methods like vasectomy and tubectomy involve cutting and tying the vas deferens and fallopian tubes, respectively. This prevents the transport of gametes (sperm and ova), which inhibits fertilization and thus prevents conception.

### Conclusion
After evaluating all the options, the correct statement regarding contraceptive methods is the fourth option: "Surgical interventions block gamete transport and thereby prevent conception."

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