Q.Intensely lactating mothers do not generally conceive due to the:
Concept understanding — Reproductive Health
Reproductive Health Significance — A First Look
Think of health as a state of complete well-being — not just the absence of disease. Now apply that to the part of your life that involves reproduction, the biological process by which new individuals are created. That is reproductive health: it is not merely about being free from infections or disorders of the reproductive system. It means having a healthy body, a clear understanding of reproductive processes, and the ability to make informed, responsible choices.
The NCERT textbook defines reproductive health as "a total well-being in all aspects of reproduction — physical, emotional, behavioural, and social." That is the core idea. It is not a narrow medical term; it is a broad, positive concept that touches every person, regardless of gender or age.
Why does it matter?
Reproductive health is significant because it directly affects the quality of life of individuals, families, and communities. When people are reproductively healthy, they can:
- Make informed decisions about marriage, family size, and childbearing.
- Prevent and manage sexually transmitted infections (STIs), including HIV/AIDS.
- Avoid unwanted pregnancies and unsafe abortions, which are major causes of maternal death.
- Ensure safe motherhood — proper care during pregnancy, delivery, and after birth reduces risks for both mother and child.
- Recognise and address problems like infertility, menstrual disorders, or reproductive cancers early.
Reproductive health is not only about problems. It also includes positive aspects like sexual well-being, the ability to have a satisfying and safe sex life, and the freedom to decide if, when, and how often to reproduce.
The bigger picture
On a national scale, reproductive health is linked to population control, maternal and child mortality rates, and the spread of diseases. The Indian government has run programmes like the Reproductive and Child Health (RCH) programme to improve access to services, education, and contraception. The goal is not just to reduce numbers — it is to ensure that every birth is wanted, every pregnancy is safe, and every child is healthy.
Reproductive health is a fundamental right, not a privilege. It requires awareness, access to healthcare, and the removal of social taboos that prevent open discussion.
Key components you should know
- Family planning — spacing and limiting births through contraception.
- Maternal and child health care — antenatal care, safe delivery, postnatal care, immunisation.
- Prevention and treatment of STIs — including HIV/AIDS.
- Adolescent reproductive health — education about puberty, menstruation, safe practices.
- Gender equality — empowering women to make decisions about their own bodies.
Reproductive health is not a separate, isolated topic. It is woven into everyday life — from the biology you learn in school to the social norms you encounter, and from personal choices to public policy. Understanding its significance helps you see why governments invest in it, why doctors emphasise it, and why every individual deserves to be reproductively healthy.
Many learners look this topic up as "Reproductive Health notes class 12 biology", "Reproductive Health important questions", or "Reproductive Health diagram and explanation". This concept is directly part of the Reproductive Health chapter in the NCERT/CBSE Class 12 Biology syllabus, and it is also an important topic for NEET and state medical/CET entrance exams, making it worth mastering for both board and competitive-exam preparation.
Lactational Amenorrhoea
During intense lactation, the high levels of prolactin required for milk production exert a suppressive effect on the hypothalamic-pituitary axis. Prolactin inhibits the release of gonadotropin-releasing hormone (GnH) from the hypothalamus, which in turn reduces the secretion of the gonadotropins—luteinising hormone (LH) and follicle-stimulating hormone (FSH)—from the anterior pituitary.
Without adequate gonadotropin levels, ovarian follicles do not mature properly, ovulation is suppressed, and the menstrual cycle remains in abeyance. This physiological state is called lactational amenorrhoea and serves as a natural, though temporary and not entirely reliable, form of contraception during the early months of exclusive breastfeeding.
The mechanism does not involve blocking gamete transport or fertilisation directly; rather, it prevents the hormonal cascade necessary for ovulation itself.
Intensely lactating mothers do not generally conceive because prolactin suppresses the secretion of gonadotropins (LH and FSH), thereby inhibiting ovulation—(A) Suppression of gonadotropins.
Intense lactation suppresses the release of gonadotropins (FSH and LH), which prevents ovulation and thus conception — a natural, temporary form of contraception known as lactational amenorrhoea.
The phenomenon you're asking about sits at the intersection of reproductive physiology and maternal biology. When a mother is breastfeeding intensely — particularly in the early months postpartum when the infant feeds frequently, day and night — her body undergoes a remarkable hormonal shift that naturally spaces pregnancies.
The key player here is prolactin, the hormone responsible for milk production. Suckling by the infant stimulates the hypothalamus to release prolactin from the anterior pituitary gland. High circulating levels of prolactin have an inhibitory effect on the hypothalamus, specifically suppressing the pulsatile release of gonadotropin-releasing hormone (GnRH). Without adequate GnRH pulses, the pituitary does not secrete sufficient amounts of the gonadotropins — follicle-stimulating hormone (FSH) and luteinizing hormone (LH).
These two gonadotropins are absolutely essential for the ovarian cycle. FSH drives the maturation of ovarian follicles, while the mid-cycle LH surge triggers ovulation. When their secretion is suppressed during lactation, follicles do not mature properly and ovulation simply does not occur. No ovulation means no egg is released, and without an egg, fertilisation and conception cannot take place.
This natural contraceptive effect is most reliable when breastfeeding is exclusive and frequent (at least every four hours during the day and every six hours at night), the mother has not yet resumed menstruation, and the infant is under six months old. It is called the lactational amenorrhoea method (LAM).
The other options can be ruled out on physiological grounds. Hyper-secretion of gonadotropins would actually promote ovulation, not prevent it. Suppression of gametic transport or fertilisation would imply that ovulation is occurring normally but something downstream is blocked — that is not the mechanism at work here. The block happens much earlier in the cascade, at the level of the brain-pituitary-ovary axis.
The suppression is at the hormonal control level: lactation keeps gonadotropin levels low, which in turn keeps the ovaries quiescent. This is why the effect is temporary and reversible — once breastfeeding frequency decreases or stops, gonadotropin secretion resumes and fertility returns.
In short, intensely lactating mothers do not generally conceive because lactation suppresses the secretion of gonadotropins (FSH and LH), preventing ovulation. The correct answer is (A) Suppression of gonadotropins.
Showing the 12 most recent of 18 on this concept.
- AP EAPCET 2026Set ap-2026-05-19-FN1 markMCQQ.Match the following: List-I - List-II: A. Vasectomy, B. Coitus interruptus, C. Cervical caps, D. Saheli; I. Oral method, II. Barrier method, III. Surgical method, IV. Natural method (A) A-IV, B-II, C-I, D-III (B) A-III, B-I, C-IV, D-II (C) A-III, B-IV, C-II, D-I (D) A-II, B-III, C-I, D-IV
›Reveal solutionSolution
Matching each contraceptive to its category: Vasectomy=Surgical,
Coitus interruptus=Natural, Cervical caps=Barrier, Saheli=Oral. Answer: (C).
Concept and Intuition
Contraceptive methods are grouped by mechanism:
- Natural methods rely on avoiding sperm-ovum contact without any device — e.g., periodic abstinence, coitus interruptus (withdrawal), lactational amenorrhea.
- Barrier methods physically block sperm from reaching the ovum — condoms, diaphragms, cervical caps, vaults.
- Oral contraceptives are pills — combined steroidal (estrogen+progestogen) or non-steroidal (like Saheli, which contains centchroman).
- Surgical methods (sterilization) permanently block gamete transport — vasectomy (males) and tubectomy (females).
Step-by-Step Solution
- A. Vasectomy → surgical method → III.
- B. Coitus interruptus → natural method (withdrawal before ejaculation) → IV.
- C. Cervical caps → barrier method → II.
- D. Saheli → oral, non-steroidal pill (taken once a week) → I.
- Matching: A-III, B-IV, C-II, D-I = option (C).
Common Mistakes
- Assuming Saheli is a barrier method because of the "cap"-sounding name of cervical caps nearby — Saheli is actually a pill, not a device.
✓Final answerThe correct option is (C) — A-III, B-IV, C-II, D-I.
ANSWER: C
- AP EAPCET 2026Set ap-2026-05-19-AN1 markMCQQ.This injection provide protection against pregnancy for three months (A) DPMA (B) Saheli (C) Multiload 375 (D) LNG 20
›Reveal solutionSolution
The three-month injectable contraceptive is DMPA (Depot Medroxyprogesterone Acetate) — the only injection among the listed options; the others are an oral pill and IUDs.
Concept and Intuition
Hormonal contraceptive methods come in several delivery formats — oral pills, injectables, implants, and hormone-releasing intrauterine devices — each with characteristic dosing intervals. Injectable progestin-only contraceptives like DMPA work by suppressing ovulation and thickening cervical mucus, and are specifically formulated as a depot (slow-release) injection given once every three months, making them a convenient long-acting reversible method that doesn't require daily compliance. This distinguishes DMPA from Saheli, a non-steroidal, once-a-week oral pill containing centchroman (an anti-implantation agent), and from Multiload 375 and LNG-20 (levonorgestrel-releasing IUD, e.g. Mirena), both of which are intrauterine devices inserted into the uterus rather than injected, and which work over much longer durations (years) rather than months.
Step-by-Step Solution
- Recognise "injection ... three months" as the defining clue for a specific hormonal contraceptive method.
- Recall DMPA (Depot Medroxyprogesterone Acetate) is precisely this — an injectable progestin given at three-month intervals.
- Eliminate Saheli (oral pill, not an injection), Multiload 375 (copper IUD, not an injection), and LNG-20 (hormone-releasing IUD, not an injection).
- Select DMPA (given here as "DPMA").
Common Mistakes
- Confusing IUDs (Multiload 375, LNG-20) with injectable methods simply because both are "long-acting."
- Mixing up Saheli's weekly oral dosing with an injectable's multi-month interval.
✓Final answerThe correct option is (A) — DPMA (DMPA).
ANSWER: A
- AP EAPCET 2026Set ap-2026-05-20-FN1 markMCQQ.Match the following: List-I | List-II A. Lippe's loop | I. Hormone releasing IUD B. Copper releasing IUD | II. Non medicated IUD C. LNG-20 | III. Weekly pill D. Saheli | IV. Multi load 375 | V. DMPA (A) A-II, B-IV, C-I, D-III (B) A-II, B-IV, C-I, D-V (C) A-III, B-I, C-IV, D-II (D) A-V, B-IV, C-III, D-I
›Reveal solutionSolution
Matching contraceptive methods to their categories: Lippes loop = non-medicated IUD, copper-releasing IUD = Multiload-375, LNG-20 = hormone-releasing IUD, Saheli = weekly pill.
Concept and Intuition
IUDs (intra-uterine devices) are grouped by generation: first-generation inert/non-medicated devices (like the Lippes loop, plain plastic with no added chemical), second-generation copper-releasing devices (like Multiload-375 and CuT, which release copper ions that are spermicidal/toxic to the embryo), and third-generation hormone-releasing devices (like LNG-20, which releases levonorgestrel locally). Saheli, by contrast, isn't an IUD at all — it's a non-steroidal oral contraceptive pill (centchroman) taken once a week, developed in India.
Step-by-Step Solution
- Lippes loop → an original inert (non-medicated) IUD → matches II.
- Copper-releasing IUD → the well-known example is Multiload-375 → matches IV.
- LNG-20 → releases the hormone levonorgestrel → matches I (hormone-releasing IUD).
- Saheli → the once-weekly oral contraceptive pill → matches III.
- Final mapping: A-II, B-IV, C-I, D-III.
Common Mistakes
- Assuming Saheli is a type of IUD (it's actually an oral pill), which would misplace it in the matching list.
✓Final answerThe correct option is (A) — A-II, B-IV, C-I, D-III.
ANSWER: A
- AP EAPCET 2026Set ap-2026-05-20-AN1 markMCQQ.Assertion (A): Ovulation generally will not immediately occur following parturition. Reason (R): Use of oral contraceptive pills inhibits ovulation. (A) Both (A) and (R) are true. (R) is correct explanation for (A) (B) Both (A) and (R) are true. (R) is not correct explanation for (A) (C) (A) is true. But (R) is false (D) (A) is false. But (R) is true
›Reveal solutionSolution
This assertion-reason question checks whether the given reason genuinely explains the natural post-parturition ovulation delay, or is simply an unrelated true fact.
Concept and Intuition
After childbirth, especially with frequent breastfeeding, elevated prolactin levels suppress the hypothalamic-pituitary-ovarian axis, delaying the return of ovulation — a phenomenon known as lactational amenorrhoea. This is a completely separate mechanism from oral contraceptive pills, which are a deliberate external hormonal intervention (synthetic estrogen-progestogen) that also happens to inhibit ovulation, but for an entirely different physiological reason and only when actually consumed.
Step-by-Step Solution
- Assess (A): ovulation is delayed after parturition — a real, well-documented physiological phenomenon (lactational amenorrhoea) → TRUE.
- Assess (R): oral contraceptive pills do inhibit ovulation — also a true, independent pharmacological fact → TRUE.
- Check the causal link: does taking oral contraceptive pills explain why ovulation is naturally suppressed after childbirth? No — the natural suppression is due to prolactin from breastfeeding, unrelated to pill use.
- Since both statements are true but (R) does not explain (A), the answer is option (B).
Common Mistakes
- Assuming any two true statements about "ovulation suppression" must be causally linked; here they describe two entirely different mechanisms (natural lactational versus artificial contraceptive suppression).
- Overlooking that (A) refers to a natural post-partum physiological state, not to contraceptive use at all.
✓Final answerThe correct option is (B) — Both (A) and (R) are true, but (R) is not the correct explanation for (A).
ANSWER: B
- AP EAPCET 2026Set ap-2026-05-20-AN1 markMCQQ.The intra uterine devices (IUDs) that make uterus unsuitable for implantation and cervix hostile to sperms are (A) LNG 20, Multiload 375 (B) CuT, Cu7 (C) Progestasert, lippes loop (D) Progestasert, LNG 20
›Reveal solutionSolution
This checks which class of IUD produces the additional anti-implantation and anti-sperm cervical effects.
Concept and Intuition
Intra-uterine devices (IUDs) fall into three categories: non-medicated (e.g., Lippes loop), copper-releasing (e.g., CuT, Cu7, Multiload 375), and hormone-releasing (e.g., Progestasert, LNG-20). While copper ions primarily increase phagocytosis of sperm and suppress sperm motility/fertilising capacity, the hormone-releasing IUDs additionally make the uterus unsuitable for implantation and make cervical mucus hostile to sperm penetration, through their local progestogen release.
Step-by-Step Solution
- Recall the three IUD categories and their differing mechanisms of action.
- Non-medicated (Lippes loop) and copper-releasing (CuT, Cu7, Multiload 375) IUDs work mainly by increasing phagocytosis and suppressing sperm motility/viability.
- Hormone-releasing IUDs (Progestasert, LNG-20) uniquely add the effects of making the uterine lining unsuitable for implantation and the cervix hostile to sperm.
- Matching this to the options gives Progestasert, LNG 20 — option (D).
Common Mistakes
- Assuming all IUDs (including plain copper devices) cause the implantation-blocking/cervix-hostile effect; that additional effect is specific to hormone-releasing IUDs.
- Confusing Multiload 375 and CuT/Cu7 (copper-releasing) with Progestasert/LNG-20 (hormone-releasing).
✓Final answerThe correct option is (D) — Progestasert, LNG 20.
ANSWER: D
- AP EAPCET 2025Set ap-2025-05-19-AN1 markMCQQ.Pick up the hormone releasing intrauterine device (A) Lippe's loop (B) Multiload 375 (C) Copper T (D) LNG - 20
›Reveal solutionSolution
This tests knowledge of contraceptive IUD types. The answer is (D) LNG-20.
Concept and Intuition
Intrauterine contraceptive devices (IUCDs) fall into three broad categories: non-medicated/inert devices (like the classic Lippe's loop), copper-releasing devices (CuT, Cu7, Multiload 375) which increase phagocytosis of sperm and are spermicidal, and hormone-releasing IUDs, which continuously release a progestin (levonorgestrel) to thicken cervical mucus and suppress endometrial receptivity. LNG-20 (levonorgestrel intrauterine system) belongs to this last hormone-releasing category.
Step-by-Step Solution
- Lippe's loop — a first-generation inert (non-medicated) IUD, no hormone or metal release.
- Multiload 375 — a copper-releasing IUD.
- Copper T — the classic copper-releasing IUD.
- LNG-20 — releases levonorgestrel, a synthetic progestin hormone, over an extended period — this is the hormone-releasing IUD.
Common Mistakes
- Assuming all IUDs work purely mechanically/via copper; overlooking that LNG-based IUDs are a distinct hormonal category.
✓Final answerThe correct option is (D) — LNG-20, a levonorgestrel (hormone)-releasing intrauterine device.
ANSWER: D
- AP EAPCET 2025Set ap-2025-05-20-AN1 markMCQQ.Which of the following is an intra uterine device (IUD) ? (A) Copper - T (B) Vault (C) Cervical cap (D) Implant
›Reveal solutionSolution
The Copper-T is inserted directly into the uterine cavity, making it the intra-uterine
device among the options, while the vault, cervical cap, and implant are placed
elsewhere (cervix or under the skin). Answer: (A).
Concept and Intuition
Contraceptive devices are classified by where in the body they are placed and how they
work. An intra-uterine device (IUD) is inserted directly into the uterus and prevents
pregnancy mainly by creating a local environment hostile to sperm/implantation; the
Copper-T is the most widely used example, releasing copper ions that are toxic to
sperm. In contrast, the vault and cervical cap are barrier methods that fit over
the cervix from the vaginal side (outside the uterus), physically blocking sperm entry.
An implant is a small rod placed under the skin (subdermal) that releases hormones
systemically — it is neither intrauterine nor a barrier device.
Step-by-Step Solution
- Recognise "intra-uterine" means placed inside the uterus.
- Copper-T is inserted into the uterine cavity through the cervix and remains there — matches the definition of IUD.
- The vault and cervical cap sit over/against the cervix from outside the uterus — they are barrier methods, not intrauterine devices.
- The implant is placed under the skin of the arm — a hormonal, subdermal method, not intrauterine.
- Hence the correct IUD among the options is (A) Copper-T.
Common Mistakes
- Classifying any cervix-area contraceptive (vault, cervical cap) as "intra-uterine" just because it is near the uterus, when it is actually a barrier method placed outside the uterine cavity.
✓Final answerThe correct option is (A) — Copper - T.
ANSWER: A
- AP EAPCET 2025Set ap-2025-05-20-FN1 markMCQQ.Assertion (A) : Lactational amenorrhea is a natural method of contraception. Reason (R) : Ovulation in mother generally does not occurs during intense lactation following parturition. Identify the correct option from the following (A) (A) and (R) are true. (R) is correct explanation for (A). (B) (A) and (R) are true. But R is not correct explanation for (A). (C) (A) is true, but (R) is false. (D) (A) is false, but (R) is true.
›Reveal solutionSolution
Lactational amenorrhea works as contraception exactly because intense suckling suppresses ovulation via prolactin-mediated inhibition of gonadotropins — both statements are true and R explains A. Answer: (A).
Concept and Intuition
During intense, frequent breastfeeding, high prolactin levels (needed to sustain milk production) suppress the hypothalamic-pituitary-ovarian axis — specifically, they inhibit the pulsatile release of GnRH, which in turn reduces LH and FSH secretion. Since a normal LH surge is required to trigger ovulation, this suppression means the mother does not typically ovulate (and hence does not menstruate) for a period after childbirth as long as she is breastfeeding intensely and exclusively. This natural, temporary infertility is what is used as the Lactational Amenorrhea Method (LAM) of contraception.
Step-by-Step Solution
- Assess Assertion (A): "Lactational amenorrhea is a natural method of contraception" — this is indeed a recognised, though time-limited and condition-dependent, contraceptive method. True.
- Assess Reason (R): "Ovulation in the mother generally does not occur during intense lactation following parturition" — this is the physiological basis of LAM, mediated by prolactin's suppression of the gonadotropin axis. True.
- Check whether R explains A: LAM works precisely because ovulation is suppressed during intense lactation, so R is indeed the correct explanation for A.
- Hence both statements are true, and R correctly explains A.
Common Mistakes
- Assuming lactational amenorrhea is unreliable and therefore "not a real contraceptive method" — it is recognised as effective under specific conditions (exclusive, frequent breastfeeding, within about six months postpartum, before menses return).
- Missing the causal (hormonal) link between suckling-induced prolactin release and suppressed ovulation.
✓Final answerThe correct option is (A) — (A) and (R) are true, and (R) is the correct explanation for (A).
ANSWER: A
- AP EAPCET 2024Set ap-2024-05-16-AN1 markMCQQ.Identify the incorrect statements among the following: I. The use of amniocentesis was banned in 1970. II. Cervical cancer was caused by Herpes Simplex Virus. III. Copper bearing IUDs, progestogen are emergency contraceptives. IV. 3-D cross sectional picture of CAT scan is called tomogram. (A) I, IV (B) I, II (C) II, III (D) II, IV
›Reveal solutionSolution
The two incorrect statements are the wrong ban-year for amniocentesis (I) and the wrong causative virus for cervical cancer (II).
Concept and Intuition
Amniocentesis-based prenatal sex determination for the purpose of female foeticide was legally banned in India via the Pre-Natal Diagnostic Techniques (PNDT) Act of 1994 — not 1970 — making any statement citing 1970 factually wrong. Cervical cancer's well-established primary cause, extensively taught in reproductive health/disease chapters, is infection by Human Papillomavirus (HPV), not Herpes Simplex Virus, so attributing it to HSV is incorrect. Meanwhile, copper-bearing IUDs and progestogen-only pills are indeed legitimate, standard emergency contraceptive options if used shortly after unprotected intercourse, and CT (CAT) scan images, being reconstructed cross-sectional pictures of the body, are indeed called tomograms — both of these statements are accurate.
Step-by-Step Solution
- Statement I: amniocentesis banned in 1970 — false; the actual ban (PNDT Act) came in 1994.
- Statement II: cervical cancer caused by Herpes Simplex Virus — false; the recognized cause is HPV.
- Statement III: copper IUDs and progestogen as emergency contraceptives — true.
- Statement IV: CT scan's cross-sectional image is a tomogram — true.
- The incorrect statements are I and II → option (B).
Common Mistakes
- Confusing HPV (the actual cause of cervical cancer) with HSV (associated with genital herpes, a different condition), since both are sexually transmitted viruses.
- Misremembering the PNDT Act's year (1994) as an earlier decade like 1970.
✓Final answerThe correct option is (B) — I, II.
ANSWER: B
- AP EAPCET 2024Set ap-2024-05-16-AN1 markMCQQ.Identify different types of intra uterine devices among the following: A) Lippes loop, B) Vaults, C) Multiload 375, D) LNG-20, E) Diaphragms (A) A, B, E (B) A, C, D (C) B, D, E (D) A, C, E
›Reveal solutionSolution
Lippes loop, Multiload 375 and LNG-20 are true IUDs; vaults and diaphragms are separate barrier (vaginal) contraceptive devices.
Concept and Intuition
Intra-uterine devices (IUDs) are contraceptive devices placed inside the uterus by a healthcare provider, working mainly by creating a locally spermicidal/inflammatory environment (copper-releasing types) or by thickening cervical mucus and thinning the endometrium (hormone-releasing types). Classic examples include the non-medicated Lippes loop, copper-releasing devices like CuT, Cu7 and Multiload 375, and hormone-releasing devices like LNG-20 (levonorgestrel-releasing IUD, e.g., Mirena). Vaults and diaphragms, in contrast, are dome-shaped rubber/silicone barrier devices placed in the vagina to cover the cervix, preventing sperm entry — they are a distinct contraceptive category (vaginal barriers), not IUDs.
Step-by-Step Solution
- Lippes loop (A) — a classic non-medicated IUD. Included.
- Vaults (B) — a vaginal barrier device, not an IUD. Excluded.
- Multiload 375 (C) — a copper-releasing IUD. Included.
- LNG-20 (D) — a hormone (levonorgestrel)-releasing IUD. Included.
- Diaphragms (E) — a vaginal barrier device, not an IUD. Excluded.
- Correct IUD set: A, C, D → option (B).
Common Mistakes
- Lumping all 'contraceptive devices' together and forgetting that vaults/diaphragms are barrier methods placed in the vagina, structurally and mechanistically different from IUDs placed in the uterus.
- Overlooking that hormone-releasing IUDs (like LNG-20) are still classified as IUDs, not as a separate 'pill' category.
✓Final answerThe correct option is (B) — A, C, D.
ANSWER: B
- AP EAPCET 2024Set ap-2024-05-16-FN1 markMCQQ.Trichomoniasis is caused by (A) Bacteria (B) Fungus (C) Protozoan (D) Virus
›Reveal solutionSolution
Trichomonas vaginalis, a flagellated protozoan, is the causative agent of trichomoniasis, a common STI.
Concept and Intuition
Trichomoniasis is one of the well-known protozoan sexually transmitted diseases, caused by Trichomonas vaginalis, a motile flagellate that infects the urogenital tract.
Step-by-Step Solution
- Recognize "Trichomonas" as a protozoan genus name (flagellate).
- Trichomoniasis is thus classified among protozoan STIs (along with, e.g., Entamoeba causing amoebiasis in a different context).
- So the causative agent category is Protozoan.
Common Mistakes
- Confusing it with a bacterial STI (like syphilis/gonorrhoea) — Trichomonas is a eukaryotic protozoan, not a bacterium.
✓Final answerThe correct option is (C) — Protozoan.
ANSWER: C
- AP EAPCET 2024Set ap-2024-05-17-AN1 markMCQQ.Saheli is a (A) Toxoid vaccine (B) Transgenic mice (C) Anti – Cancer drug (D) Non – Steroid oral contraceptive pill
›Reveal solutionSolution
This tests reproductive health/contraception facts; Saheli is a non-steroidal oral contraceptive.
Concept and Intuition
Most oral contraceptive pills are steroidal (combinations of synthetic estrogen and progesterone analogues). Saheli, developed in India, is distinctive precisely because it is non-steroidal — its active compound is centchroman, which acts by interfering with the endometrium, and is taken once a week rather than daily.
Step-by-Step Solution
- Saheli is not a vaccine (toxoid), transgenic organism, or anti-cancer drug — eliminate (A), (B), (C).
- It is specifically known and taught as a non-steroidal oral contraceptive pill, distinguishing it from conventional steroidal pills.
Common Mistakes
- Assuming all oral contraceptive pills must be steroidal — Saheli is the textbook exception.
✓Final answerThe correct option is (D) — Non–Steroid oral contraceptive pill.
ANSWER: D
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