Question: 158. Which of the following is not a natural/traditional contraceptive method?
(1) Coitus interruptus
(2) Periodic abstinence
(3) Lactational amenorrhea
(4) Vaults
Answer: Option (4)
Explanation:
Natural or traditional contraceptive methods prevent pregnancy without using mechanical devices, chemicals, or hormones.
Coitus interruptus, periodic abstinence, and lactational amenorrhea are natural methods based on behavioral or physiological factors.
Vaults are barrier contraceptive devices placed inside the vagina to prevent sperm from entering the cervix.
Since vaults are mechanical barrier methods and not natural or traditional methods, they do not belong to this category.
Therefore, the correct answer is option (4).