Contraception and Family Planning — MCQs

Contraception and Family Planning Indian Medical PG Practice Questions and MCQs

Question 321: What is the minimum effective dose of estrogen in oral contraceptive pills (OCPs)?

A. 20 mcg (Correct Answer)
B. 30 mcg
C. 40 mcg
D. 50 mcg

Explanation: **Explanation:** The correct answer is **20 mcg**. The evolution of Combined Oral Contraceptive Pills (COCPs) has been characterized by a steady reduction in the dose of estrogen (Ethinyl Estradiol) to minimize side effects while maintaining contraceptive efficacy. 1. **Why 20 mcg is correct:** Modern "low-dose" OCPs typically contain 20–35 mcg of Ethinyl Estradiol. Clinical studies have established that **20 mcg** is the minimum effective dose required to consistently suppress follicle-stimulating hormone (FSH) and prevent ovulation. While ultra-low-dose pills (15 mcg) exist, 20 mcg remains the standard minimum threshold for reliable efficacy in conventional practice. 2. **Why other options are incorrect:** * **30 mcg:** This is a common dosage in "low-dose" pills (e.g., Mala-N and Mala-D contain 30 mcg), but it is not the *minimum* effective dose. * **50 mcg:** Pills containing ≥50 mcg are termed "high-dose" pills. These are rarely used today due to a significantly higher risk of venous thromboembolism (VTE) and cardiovascular complications. * **40 mcg:** This is an intermediate dose used in older formulations but does not represent the minimum threshold. **High-Yield Clinical Pearls for NEET-PG:** * **Mala-N & Mala-D:** Contain 30 mcg Ethinyl Estradiol + 0.15 mg Levonorgestrel. * **Centchroman (Saheli):** A Non-steroidal, Selective Estrogen Receptor Modulator (SERM). Dosage: 30 mg twice weekly for 3 months, then once weekly. * **Mechanism of Action:** Estrogen primarily inhibits **FSH** (preventing follicular development), while Progesterone inhibits **LH surge** (preventing ovulation) and thickens cervical mucus. * **VTE Risk:** The risk of thromboembolism is directly proportional to the dose of estrogen. This is why the shift toward 20 mcg is clinically significant.

Question 322: What does the '200' in Cu T 200 refer to?

A. 200 sq mm of copper over the loop (Correct Answer)
B. 200 mm of copper over the loop
C. For 200 days, copper concentration does not change
D. 200 sq cm of copper over the loop

Explanation: ### Explanation **1. Why Option A is Correct:** In Intrauterine Contraceptive Devices (IUCDs) like the Copper T, the numerical value (e.g., 200, 375, 380A) refers to the **total surface area of the copper wire** (in square millimeters) wrapped around the plastic frame. In Cu T 200, there is **200 sq mm** of copper. This surface area is critical because the contraceptive efficacy depends on the continuous release of copper ions into the uterine cavity, which causes a local inflammatory response, alters endometrial enzymes, and acts as a spermicide. **2. Why Other Options are Incorrect:** * **Option B:** Copper is measured by surface area (sq mm), not linear length (mm). The thickness and length of the wire are calibrated to achieve the specific surface area. * **Option C:** This is a distractor. The "200" does not refer to the duration of action in days. Most Cu T 200 devices are effective for 3 years. * **Option D:** 200 sq cm would be an enormous amount of copper (roughly the size of a small notebook), which is anatomically impossible for an IUCD. The unit is always **square millimeters (sq mm)**. **3. High-Yield Clinical Pearls for NEET-PG:** * **Cu T 380A:** Currently the "Gold Standard" IUCD. The 'A' signifies it has copper collars on the transverse arms. Its lifespan is **10 years**. * **Nova T / Multiload 375:** These have a silver core or different shapes to prevent fragmentation and increase lifespan (5 years). * **Mechanism of Action:** Primarily **spermicidal** (inhibits sperm motility and viability). It is not an abortifacient. * **Ideal Candidate:** Multiparous women in a stable monogamous relationship. * **Most Common Side Effect:** Excessive menstrual bleeding (menorrhagia). * **Most Common Reason for Removal:** Pain and bleeding.

Question 323: What is the failure rate of vasectomy?

A. 0.20%
B. 0.50% (Correct Answer)
C. 3%
D. 10%

Explanation: **Explanation:** The failure rate of a contraceptive method is typically expressed using the **Pearl Index**, which measures the number of unintended pregnancies per 100 woman-years of exposure. **1. Why 0.50% is correct:** Vasectomy is one of the most effective forms of permanent sterilization. According to standard textbooks (like Park’s PSM and Williams Obstetrics), the typical failure rate of vasectomy is approximately **0.15% to 0.5%**. While it is technically more effective than tubectomy (which has a failure rate of ~0.5%), the standard accepted value for competitive exams like NEET-PG is 0.5%. Failure usually occurs due to spontaneous recanalization or unprotected intercourse before the semen is cleared of remaining sperm. **2. Analysis of incorrect options:** * **0.20% (Option A):** While some studies cite 0.1%–0.2% for "perfect use," 0.5% is the standard "typical use" figure cited in Indian medical curricula. * **3% (Option C):** This is too high for a permanent method. A 3% failure rate is more characteristic of barrier methods like the diaphragm or systemic methods with poor compliance. * **10% (Option D):** This represents high-failure methods like withdrawal (Coitus Interruptus) or inconsistent condom use. **3. Clinical Pearls for NEET-PG:** * **Post-procedure advice:** Vasectomy is **not immediately effective**. Patients must use alternative contraception for **3 months or 20 ejaculations** until azoospermia is confirmed by semen analysis. * **Technique:** The "No-Scalpel Vasectomy" (NSV) is the preferred technique due to fewer complications (hematoma/infection). * **Comparison:** Vasectomy is safer, simpler, and more effective than female sterilization (tubectomy).

Question 324: Mirena is a:

A. Used in abortions
B. Anti-progesterone
C. Progesterone IUCD (Correct Answer)
D. Hormonal implant

Explanation: **Explanation:** **Mirena** is a Levonorgestrel-releasing Intrauterine System (LNG-IUS). It is classified as a **Progesterone-releasing IUCD** (Option C). It consists of a T-shaped polyethylene frame with a reservoir containing 52 mg of Levonorgestrel, which is released at an initial rate of 20 µg/day directly into the uterine cavity. **Analysis of Options:** * **Option A (Used in abortions):** Mirena is a contraceptive device, not an abortifacient. While it prevents pregnancy, it is not used to terminate an existing one. * **Option B (Anti-progesterone):** Mirena releases a potent progestogen (Levonorgestrel). Examples of anti-progesterones include Mifepristone (RU-486), used in medical abortions. * **Option D (Hormonal implant):** Hormonal implants (e.g., Norplant, Implanon/Nexplanon) are placed subdermally in the arm, whereas Mirena is an intrauterine device. **High-Yield Clinical Pearls for NEET-PG:** 1. **Mechanism of Action:** Primarily acts by **thickening cervical mucus** (preventing sperm penetration) and causing **endometrial atrophy** (preventing implantation). It may also inhibit ovulation in some cycles. 2. **Non-Contraceptive Benefits:** It is the **Gold Standard/Medical treatment of choice for Menorrhagia** (DUB) and is also used in the management of endometriosis and endometrial hyperplasia. 3. **Lifespan:** Approved for use for up to **5–8 years** (depending on the latest guidelines; 5 years is the standard textbook answer). 4. **Side Effect:** The most common side effect in the first few months is irregular spotting/breakthrough bleeding, eventually leading to **amenorrhea** in many users (which is often a therapeutic goal).

Question 325: What is the preferred method of contraception for managing menorrhagia?

A. Modified IUD
B. Cu-T
C. Levonorgestrel-releasing IUD (LNG IUD) (Correct Answer)
D. Condom

Explanation: ### Explanation **Correct Answer: C. Levonorgestrel-releasing IUD (LNG IUD)** The **LNG IUD (Mirena)** is the preferred contraceptive method for managing menorrhagia (Heavy Menstrual Bleeding) because it acts directly on the endometrium. It releases a steady dose of levonorgestrel, which leads to **endometrial atrophy** and down-regulation of estrogen receptors. This results in a significant reduction in menstrual blood loss (up to 90% within 3–6 months) and often leads to amenorrhea. It is considered a first-line medical management for idiopathic menorrhagia, often preventing the need for surgical interventions like hysterectomy. **Analysis of Incorrect Options:** * **A. Modified IUD:** This is a vague term. While some modified frames exist, they do not possess the specific hormonal properties required to treat menorrhagia. * **B. Cu-T (Copper T):** This is **contraindicated** in patients with menorrhagia. A common side effect of copper-bearing IUDs is an *increase* in menstrual blood loss and dysmenorrhea due to a local inflammatory response. * **D. Condom:** While an effective barrier contraceptive, it has no hormonal influence on the menstrual cycle and provides no therapeutic benefit for heavy bleeding. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard:** LNG IUD is the most effective non-surgical treatment for Heavy Menstrual Bleeding (HMB). * **Pearl:** It is also used in the management of endometriosis, adenomyosis, and endometrial hyperplasia without atypia. * **Failure Rate:** The Pearl Index of LNG IUD is approximately **0.2**, making it as effective as sterilization. * **Life Span:** The standard LNG IUD (52mg) is FDA-approved for **8 years** for contraception (though often cited as 5 years for menorrhagia).

Question 326: Which of the following intrauterine devices has the minimum failure rate?

A. Progestase
B. Cu T-380 A
C. Levonorgestrel IUD (Correct Answer)
D. T Cu -200

Explanation: The efficacy of an Intrauterine Device (IUD) is primarily determined by its mechanism of action and the surface area of the active component. ### **Explanation of the Correct Answer** **C. Levonorgestrel IUD (LNG-20) / Mirena:** This is the most effective reversible contraceptive method available. It has a failure rate of approximately **0.2 per 100 woman-years**, which is comparable to surgical sterilization. Its superior efficacy is due to a dual mechanism: it acts as a local foreign body and releases 20 µg of levonorgestrel daily. This thickens cervical mucus (preventing sperm penetration), causes endometrial atrophy (preventing implantation), and occasionally inhibits ovulation. ### **Analysis of Incorrect Options** * **A. Progestasert:** This was a first-generation hormonal IUD that released natural progesterone. It had a higher failure rate (approx. 2.0%) and a short lifespan (1 year), making it less effective than modern LNG-IUDs. * **B. Cu T-380 A:** This is the most effective copper IUD with a failure rate of **0.6–0.8 per 100 woman-years**. While highly effective and the "gold standard" for non-hormonal IUDs, its failure rate is slightly higher than the LNG-IUD. * **D. T Cu-200:** This is an older generation copper IUD with a smaller surface area (200 $mm^2$). Lower copper surface area correlates with higher failure rates (approx. 2.0–3.0%). ### **NEET-PG High-Yield Pearls** * **Most effective overall contraceptive:** Implant (Nexplanon) > LNG-IUD > Vasectomy. * **Life span of IUDs:** Cu T-380A (10 years), LNG-20/Mirena (5–7 years), Cu T-200 (3 years). * **Ideal Candidate for LNG-IUD:** Women with Menorrhagia (DUB) or Endometriosis, as it significantly reduces menstrual blood loss. * **Commonest side effect:** For Copper T, it is **bleeding**; for LNG-IUD, it is **amenorrhea/spotting**.

Question 327: Ulipristal acetate is:

A. A GnRH agonist
B. An androgen antagonist
C. A selective estrogen receptor modulator
D. A selective progesterone receptor modulator (Correct Answer)

Explanation: **Explanation:** **Ulipristal acetate (UPA)** is a **Selective Progesterone Receptor Modulator (SPRM)**. It acts as a potent, orally active synthetic steroid that exerts tissue-specific mixed progesterone agonist and antagonist effects. **Why Option D is Correct:** In the context of emergency contraception, Ulipristal acts primarily by **inhibiting or delaying ovulation**. It binds to the progesterone receptors with high affinity, preventing the LH (Luteinizing Hormone) surge even if the surge has already started (unlike Levonorgestrel, which is ineffective once the LH surge begins). This makes it the most effective emergency contraceptive pill (ECP) for up to 120 hours (5 days) after unprotected intercourse. **Why Other Options are Incorrect:** * **A. GnRH Agonist:** Examples include Leuprolide and Goserelin. These are used for endometriosis and precocious puberty, not as ECPs. * **B. Androgen Antagonist:** Examples include Spironolactone or Flutamide, used in PCOS or prostate cancer. * **C. Selective Estrogen Receptor Modulator (SERM):** Examples include Tamoxifen, Raloxifene, or Ormeloxifene (Saheli). These modulate estrogen receptors, not progesterone receptors. **High-Yield Clinical Pearls for NEET-PG:** * **Dosage:** 30 mg single dose for emergency contraception. * **Window of Efficacy:** Effective up to **120 hours (5 days)**, whereas Levonorgestrel (LNG) is ideally used within 72 hours. * **Other Uses:** Also used in the medical management of **Uterine Fibroids** (to reduce size and bleeding). * **Contraindication:** Breastfeeding is not recommended for one week after intake. * **Comparison:** Ulipristal is more effective than LNG in women with a higher BMI (>30 kg/m²).

Question 328: A couple requires emergency contraception four days after unprotected intercourse. What is the recommended contraceptive method?

A. Oral contraceptive pills
B. Copper T 380 IUD (Correct Answer)
C. Yuzpe method
D. Low dose progestogen-only pills

Explanation: ### Explanation **Correct Option: B. Copper T 380 IUD** The key to this question lies in the **timing of emergency contraception (EC)**. The patient is presenting **four days (96 hours)** after unprotected intercourse. * **Copper T 380 IUD:** This is the most effective method of emergency contraception. It can be inserted up to **5 days (120 hours)** after unprotected intercourse or up to 5 days after the earliest expected date of ovulation. It works primarily by preventing fertilization and interfering with implantation. It has a failure rate of less than 0.1%. **Why other options are incorrect:** * **A. Oral contraceptive pills (OCPs):** Standard OCPs are not used as EC unless taken in specific high doses (Yuzpe regimen). Even then, they are less effective than the IUD and generally recommended within 72 hours. * **C. Yuzpe method:** This involves combined estrogen-progestogen pills. It must be initiated within **72 hours** for optimal efficacy and is associated with significant side effects like nausea and vomiting. * **D. Low dose progestogen-only pills:** While Levonorgestrel (LNG) 1.5mg is a common EC, it is most effective within 72 hours. While it can be used up to 120 hours, its efficacy decreases significantly after 72 hours compared to the Copper IUD. **High-Yield NEET-PG Pearls:** 1. **Gold Standard:** The Copper IUD is the most effective EC and provides ongoing long-term contraception. 2. **Ulipristal Acetate (30mg):** This is the most effective *oral* EC and can be used up to **120 hours** (5 days). However, if the Copper IUD is an option, it remains superior. 3. **Levonorgestrel (LNG):** Recommended dose is 1.5 mg (single dose) or 0.75 mg (two doses 12 hours apart). 4. **Mechanism:** EC methods primarily work by delaying ovulation; however, the Copper IUD also prevents implantation. EC **cannot** disrupt an already established pregnancy (it is not an abortifacient).

Question 329: A woman was taking progestin-only pills for contraception. Which side-effect is not likely to occur?

A. Acne
B. Amenorrhea
C. Dysmenorrhea (Correct Answer)
D. Obesity

Explanation: **Explanation:** Progestin-only pills (POPs), often called the "minipill," primarily work by thickening cervical mucus and thinning the endometrial lining. In many women, they also inhibit ovulation. **Why Dysmenorrhea is the correct answer:** Dysmenorrhea (painful menstruation) is primarily caused by high levels of **prostaglandins** released during the shedding of a secretory endometrium. Progestins cause endometrial atrophy and often lead to anovulation. By thinning the uterine lining and reducing menstrual flow (or causing amenorrhea), POPs actually **improve or treat dysmenorrhea** rather than causing it. Therefore, it is the "least likely" side effect. **Analysis of Incorrect Options:** * **Acne:** Progestins (especially older generations like Levonorgestrel) have varying degrees of **androgenic activity**. This can stimulate sebaceous glands, leading to acne and oily skin. * **Amenorrhea:** Due to the continuous administration of progestin without an estrogen-induced proliferative phase, the endometrium becomes thin and atrophic. This frequently results in irregular spotting or complete cessation of menses (amenorrhea). * **Obesity:** Weight gain is a commonly reported side effect of hormonal contraceptives, including POPs, often attributed to increased appetite or fluid retention associated with progestogenic effects. **High-Yield NEET-PG Pearls:** * **Mechanism of Action:** The primary mechanism of POPs is **cervical mucus thickening**. Inhibition of ovulation occurs in only about 60-80% of cycles. * **The "3-Hour Rule":** Traditional POPs must be taken at the same time every day; a delay of more than 3 hours requires backup contraception for 48 hours. * **Ideal Candidate:** POPs are the contraceptive of choice for **lactating mothers** (as they don't suppress milk production) and women with contraindications to estrogen (e.g., history of DVT or smokers >35 years).

Question 330: Which of the following statements regarding vasectomy is FALSE?

A. It leads to immediate sterility. (Correct Answer)
B. The failure rate is 0.15 per 100 woman-years.
C. It involves ligation and division of the vas deferens.
D. The wife may be given Depot Medroxyprogesterone Acetate (DMPA) for 3 months.

Explanation: **Explanation:** **Why Option A is False:** Vasectomy does **not** lead to immediate sterility. After the procedure, viable sperm remain stored in the reproductive tract distal to the site of ligation (specifically in the ampulla of the vas and the seminal vesicles). Sterility is only achieved once these stored sperm are cleared. Patients are advised to use alternative contraception until **two consecutive semen analyses** show azoospermia, or for a period of **3 months (or approximately 20 ejaculations)**. **Analysis of Other Options:** * **Option B:** The failure rate of vasectomy is approximately **0.1-0.15 per 100 woman-years**, making it one of the most effective permanent contraceptive methods, even more reliable than tubectomy. * **Option C:** The standard surgical procedure involves the **ligation and division** (excision of a small segment) of the vas deferens to prevent the passage of sperm from the testes to the ejaculate. * **Option D:** Since the man is not immediately sterile, the couple must use "bridge" contraception. Giving the wife **DMPA (Antara program)** for 3 months is a clinically sound strategy to cover the lag period until the husband’s semen is confirmed sperm-free. **High-Yield Clinical Pearls for NEET-PG:** * **No-Scalpel Vasectomy (NSV):** The preferred technique developed by Li Shunqiang; it has lower rates of hematoma and infection compared to the conventional method. * **Recanalization:** Spontaneous recanalization is the most common cause of late failure. * **Post-Vasectomy Complications:** Sperm granuloma (most common), hematoma, and the development of anti-sperm antibodies (seen in 50-70% of men, though usually clinically insignificant). * **Reversibility:** Vasovasostomy can restore patency, but fertility rates vary.

Practice by Chapter

Natural Family Planning Methods

Practice Questions

Barrier Methods

Practice Questions

Hormonal Contraceptives

Practice Questions

Intrauterine Devices

Practice Questions

Emergency Contraception

Practice Questions

Permanent Contraception Methods

Practice Questions

Contraception in Special Populations

Practice Questions

Contraceptive Counseling

Practice Questions

Side Effects and Complications of Contraceptives

Practice Questions

Future Contraceptive Technologies

Practice Questions

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