Ideal Contraceptive Properties & Methods — NEET Biology
📚 Practice ConceptAn ideal contraceptive should be user-friendly, easily available, effective and reversible with no or least side-effects. It also should in no way interfere with the sexual drive, desire and/or the sexual act of the user. A wide range of contraceptive methods are presently available which could be broadly grouped into the following categories, namely Natural/Traditional, Barrier, IUDs, Oral contraceptives, Injectables, Implants and Surgical methods.
Which of the following statements regarding contraceptive methods are NOT correct? S1: Condoms, diaphragms, cervical caps, and vaults are barrier methods that prevent conception by physically blocking sperm entry into the female reproductive tract. S2: Intra Uterine Devices (IUDs) are generally self-inserted by the user and are primarily effective only for delaying pregnancy, not for spacing children. S3: Copper-releasing IUDs like CuT and Cu7 increase phagocytosis of sperms within the uterus and suppress sperm motility. S4: Oral contraceptive pills primarily work by blocking gamete transport, similar to surgical methods, making them highly irreversible. S5: Vasectomy involves tying up a small part of the vas deferens in males, while tubectomy involves removing or tying up a small part of the fallopian tube in females. S6: Saheli, a new oral contraceptive for females, is a daily non-steroidal pill with very few side effects and high contraceptive value.
View solution & NCERT explanation
Correct answer: B — S2, S4 and S6 only
Let's evaluate each statement: S1: This statement is correct. Condoms, diaphragms, cervical caps, and vaults are indeed barrier methods that prevent ovum and sperms from physically meeting by blocking sperm entry. (NCERT Page 44, Para 3) S2: This statement is NOT correct. Intra Uterine Devices (IUDs) are inserted by doctors or expert nurses, not self-inserted. They are ideal contraceptives for females who want to delay pregnancy and/or space children. (NCERT Page 44, Para 4; Page 45, Para 1) S3: This statement is correct. Copper-releasing IUDs such as CuT and Cu7 release Cu ions that increase phagocytosis of sperms within the uterus and suppress sperm motility and their fertilising capacity. (NCERT Page 44, Para 4) S4: This statement is NOT correct. Oral contraceptive pills inhibit ovulation and implantation, and alter the quality of cervical mucus to prevent/retard entry of sperms. Surgical methods (vasectomy and tubectomy) block gamete transport and are generally considered terminal with very poor reversibility. (NCERT Page 45, Para 2; Page 45, Para 4) S5: This statement is correct. Vasectomy is a surgical method in males where a small part of the vas deferens is removed or tied up. Tubectomy is a surgical method in females where a small part of the fallopian tube is removed or tied up. (NCERT Page 45, Para 4) S6: This statement is NOT correct. Saheli is a new oral contraceptive for females containing a non-steroidal preparation, but it is a 'once a week' pill, not a daily pill for 21 days. (NCERT Page 45, Para 2) Therefore, statements S2, S4, and S6 are NOT correct. The final answer is B. Tested concept: This question assesses the understanding of different contraceptive methods, their mechanisms of action, and key features as described in the NCERT.
What does NCERT say about ideal contraceptive should be?
Has this concept appeared in NEET?
Which chapter is this from?
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