Contraception and Family Planning Practice Questions

Q: Which of the following is an absolute contraindication for combined oral contraceptive pills?

Previous history of thromboembolism. **Explanation:** The correct answer is **Previous history of thromboembolism**. Combined Oral Contraceptive Pills (COCPs) contain estrogen, which increases the hepatic synthesis of clotting factors (II, VII, IX, and X) and decreases anticoagulant levels (Antithrombin III). This creates a hypercoagulable state. Therefore, any condition involving active or past venous thromboembolism (VTE), pulmonary embolism, or major surgery with prolonged immobilization is an **absolute contraindication** (WHO Medical Eligibility Criteria Category 4). **Analysis of Incorrect Options:** * **Diabetes Mellitus:** It is generally a relative contraindication. It only becomes an absolute contraindication if there are vascular complications (nephropathy, retinopathy, neuropathy) or if the duration of diabetes is >20 years. * **Migraine:** Migraine *without* aura is a relative contraindication (Category 3). However, Migraine *with* aura at any age is an absolute contraindication due to the significantly increased risk of ischemic stroke. * **Heart Disease:** This is a broad term. While ischemic heart disease or complicated valvular disease are absolute contraindications, mild forms of heart disease are not. **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Contraindications (WHO Category 4):** Smoker >35 years (≥15 cigarettes/day), Hypertension (≥160/100 mmHg), Current Breast Cancer, and Acute Hepatitis/Cirrhosis. * **Cancer Risk:** COCPs *decrease* the risk of Ovarian and Endometrial cancers (protective effect) but slightly *increase* the risk of Breast and Cervical cancers. * **Drug Interaction:** Rifampicin and Antiepileptics (enzyme inducers) decrease the efficacy of COCPs.

Q: Progesterone-only pills act by which of the following mechanisms?

Thickening of cervical mucus. **Explanation:** Progesterone-only pills (POPs), often referred to as the "Mini-pill," primarily function by altering the female reproductive tract's environment rather than consistently suppressing the hypothalamic-pituitary-ovarian axis. **1. Why Option A is Correct:** The **primary mechanism of action** of POPs is the **thickening and hypertrophy of cervical mucus**. Under the influence of continuous low-dose progesterone, the mucus becomes scanty, thick, and viscous (hostile). This creates a physical barrier that prevents sperm penetration into the upper reproductive tract. **2. Analysis of Incorrect Options:** * **Option B (Inhibiting ovulation):** While this is the primary mechanism for Combined Oral Contraceptive Pills (COCPs) and injectable progesterones (DMPA), POPs only inhibit ovulation in approximately 40–60% of cycles. Therefore, it is not their *primary* or most reliable mechanism. * **Option C (Aseptic inflammation):** This is the mechanism of action for **Intrauterine Devices (IUDs)**, particularly non-medicated ones like Lippes Loop or Copper-T, which trigger a foreign body reaction in the endometrium. * **Option D (Destruction of the embryo):** This is incorrect as contraceptives act to prevent fertilization or implantation; they are not abortifacients. **High-Yield NEET-PG Pearls:** * **Endometrial Changes:** POPs also cause endometrial atrophy, making the lining unfavorable for implantation (secondary mechanism). * **Half-life:** POPs have a very short half-life; they must be taken at the **same time every day**. A delay of more than **3 hours** is considered a "missed pill." * **Ideal Candidate:** POPs are the contraceptive of choice for **lactating mothers** (as they do not suppress milk production) and women in whom estrogen is contraindicated (e.g., history of DVT or smokers >35 years).

Q: What is the mechanism of action of spermicides?

Disrupting cell membrane and motility. **Explanation:** Spermicides are chemical barrier methods of contraception. The most commonly used active ingredient is **Nonoxynol-9**, a surfactant. **1. Why the correct answer is right:** The primary mechanism of action involves the **disruption of the sperm cell membrane (lipoprotein surface)**. As a surfactant, Nonoxynol-9 reduces surface tension, causing the cell membrane to break down. This leads to the loss of sperm motility and eventual cell death (spermicidal effect). By immobilizing the sperm, it prevents them from ascending the female genital tract to reach the ovum. **2. Why the incorrect options are wrong:** * **Option A:** Activating acrosomal enzymes would actually facilitate fertilization (the acrosome reaction is necessary for sperm to penetrate the egg). Spermicides aim to inhibit, not promote, this process. * **Option B:** While some metabolic interference may occur, the primary and definitive action is physical membrane disruption, not specific inhibition of glucose transport enzymes. * **Option C:** Spermicides do not function by altering vaginal enzymes; however, they may temporarily alter vaginal pH or microflora, which is a side effect rather than the primary contraceptive mechanism. **3. NEET-PG High-Yield Pearls:** * **Active Ingredient:** Nonoxynol-9 is the most common; others include Octoxynol-9 and Menfegol. * **Failure Rate:** High when used alone (Typical failure rate ~28%). It is best used in combination with barriers like condoms or diaphragms. * **Clinical Caution:** Frequent use of Nonoxynol-9 can cause vaginal/cervical irritation and epithelial disruption, which may **increase the risk of HIV and STI transmission**. * **Application:** Must be placed high in the vagina near the cervix at least 10–15 minutes before intercourse.

Q: Which contraceptive method can prevent cervical cancer?

Condom. **Explanation:** **1. Why Condom is the Correct Answer:** Cervical cancer is primarily caused by persistent infection with high-risk strains of **Human Papillomavirus (HPV)**, a sexually transmitted infection (STI). Condoms act as a mechanical barrier that reduces the skin-to-skin and mucosal transmission of HPV during intercourse. By preventing the primary cause (HPV infection), condoms serve as a protective factor against the development of cervical intraepithelial neoplasia (CIN) and subsequent cervical cancer. **2. Analysis of Incorrect Options:** * **Oral Contraceptive Pills (OCPs):** Combined OCPs are actually associated with a **slight increase** in the risk of cervical cancer if used for more than 5 years. This is likely due to hormonal influences on the transformation zone and the fact that users are less likely to use barrier protection. (Note: OCPs are *protective* against Ovarian and Endometrial cancers). * **Mini Pills (Progestogen-Only Pills):** These do not provide protection against STIs/HPV and have no documented protective effect against cervical cancer. * **Tubectomy:** This is a permanent surgical sterilization method. While some studies suggest it may slightly reduce the risk of *ovarian* cancer (by preventing the migration of precursors from the fallopian tubes), it has no effect on the pathogenesis of cervical cancer. **3. NEET-PG High-Yield Pearls:** * **Dual Protection:** Condoms are the only contraceptive method that provides "dual protection" (prevention of both pregnancy and STIs/HIV). * **OCP Cancer Profile:** * *Decreases risk of:* Ovarian, Endometrial, and Colorectal cancers. * *Increases risk of:* Cervical and Breast cancers. * **Primary Prevention of Cervical Cancer:** The most effective primary prevention is the **HPV Vaccine** (e.g., Gardasil), while condoms are a significant secondary behavioral intervention.

Q: Which of the following medications is used as a post-coital pill?

0.75 mg Levonorgestrel. **Explanation:** **1. Why Levonorgestrel (LNG) is correct:** Levonorgestrel is a synthetic progestogen and is the most widely used emergency contraceptive (EC) pill. The standard regimen involves either a single dose of **1.5 mg** or two doses of **0.75 mg** taken 12 hours apart. To be effective, it must be administered within **72 hours** of unprotected intercourse. Its primary mechanism of action is the **inhibition or delay of ovulation** by suppressing the LH surge; it does not disrupt an established pregnancy. **2. Analysis of Incorrect Options:** * **A. 25 mg Mifepristone:** While Mifepristone (an anti-progestin) is highly effective as an EC, the standard low-dose used for this purpose is **10 mg**. A 25 mg dose is not the conventional EC strength; higher doses (200 mg) are used for medical abortion in combination with Misoprostol. * **B. Misoprostol:** This is a Prostaglandin E1 analogue used for cervical ripening, induction of labor, and medical abortion. It has no role as a primary post-coital contraceptive. * **C. 10 mg Ethinylestradiol:** High-dose estrogens alone are no longer used due to severe side effects like nausea and vomiting. In the older **Yuzpe Regimen**, 100 mcg of Ethinylestradiol was combined with 0.5 mg of LNG. **3. High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard:** The most effective emergency contraceptive is the **Copper-T (IUCD)**, which can be inserted up to 5 days after intercourse. * **Ulipristal Acetate (30 mg):** A selective progesterone receptor modulator (SPRM) that is effective up to **120 hours (5 days)** and is superior to LNG in efficacy. * **Failure Rate:** LNG has a failure rate of approximately 1–3%. It is less effective in women with a BMI >30 kg/m². * **Centchroman (Saheli):** A non-steroidal SERM used as a weekly oral contraceptive, not as a standard post-coital pill.

Q: While using the "safe period" method for contraception, what is considered the unsafe period?

Days 12-18 of the menstrual cycle. **Explanation:** The "Safe Period" or **Rhythm Method** is based on the physiological timing of ovulation and the lifespan of gametes. To determine the unsafe period, we consider two key factors: the **ovum survives for about 24 hours** after ovulation, and **sperm can survive for up to 48–72 hours** in the female reproductive tract. In a standard 28-day cycle, ovulation typically occurs on Day 14. To account for the viability of sperm deposited before ovulation and the survival of the egg after, a "buffer" is created. The **unsafe period** (fertile window) is generally calculated as **3 days before and 3 days after ovulation** (Day 11 to Day 17). Option B (Days 12–18) most closely aligns with this high-risk window for conception. **Analysis of Incorrect Options:** * **Option A (Days 3–7):** This is the early follicular phase/menstrual phase. Estrogen levels are low, and the follicle is not yet mature, making conception highly unlikely. * **Option C (Days 7–21):** While this range includes the unsafe period, it is overly broad. In a regular cycle, the first week and the third week are generally considered safe. * **Option D (Days 21–28):** This is the late luteal phase. After the ovum degenerates (24 hours post-ovulation), fertilization is impossible. This is the "absolute safe period." **NEET-PG High-Yield Pearls:** * **Ogino-Knaus Formula:** For irregular cycles, the fertile period is calculated as: (Shortest cycle minus 18 days) to (Longest cycle minus 11 days). * **Pearl Index:** The failure rate of the rhythm method is high (approx. 20–25 per 100 woman-years). * **Standard Days Method:** Uses "CycleBeads" to identify Days 8–19 as unsafe for women with cycles between 26–32 days.

Q: After withdrawal of DMPA, most women conceive within what timeframe?

1 year. **Explanation:** The correct answer is **1 year (Option C)**. **1. Understanding the Concept:** Depot Medroxyprogesterone Acetate (DMPA) is a long-acting injectable progestogen that inhibits ovulation by suppressing the hypothalamic-pituitary-ovarian axis. Unlike oral contraceptives, DMPA has a **delayed return to fertility**. This is because the drug is highly lipophilic and is released slowly from the muscle/fat depot. Even after the 3-month contraceptive effect wears off, sub-therapeutic levels may persist in the body, delaying the resumption of regular ovulation. On average, it takes about **7 to 10 months** for fertility to return, with approximately **60-70% of women conceiving by 12 months** and over 90% by 24 months. **2. Analysis of Incorrect Options:** * **Option A & B (Immediately / 2-4 weeks):** These are incorrect because the suppression of the pituitary axis by DMPA is profound and long-lasting. Unlike Barrier methods or Copper-T, where fertility returns immediately upon removal, DMPA requires time for the drug to be completely metabolized. * **Option D (6 months):** While some women may ovulate by 6 months, the majority of the population requires a longer duration (closer to 10-12 months) to achieve pregnancy. **3. High-Yield Facts for NEET-PG:** * **Dose:** 150 mg intramuscularly (IM) every 3 months (12 weeks). * **Mechanism:** Primarily inhibits ovulation; also thickens cervical mucus and thins the endometrium. * **Side Effects:** Menstrual irregularities (most common), weight gain, and a **reversible decrease in Bone Mineral Density (BMD)**. * **Amenorrhea:** Approximately 50% of users develop amenorrhea after 1 year of use. * **Clinical Pearl:** Always counsel patients that DMPA does *not* cause permanent infertility, but they must be prepared for a significant delay (up to 12-18 months) before conception.

Q: Use of progestin-only pills as a mode of contraception is contraindicated in all of the following conditions, EXCEPT:

Lactation. **Explanation:** Progestin-only pills (POPs), also known as the "mini-pill," are a preferred method of contraception in specific clinical scenarios where estrogen is contraindicated. **Why Lactation is the Correct Answer:** Lactation is an **indication**, not a contraindication, for POPs. Unlike combined oral contraceptives (COCs), POPs do not contain estrogen. Estrogen is known to suppress milk production (hypogalactia). Therefore, POPs are the hormonal contraceptive of choice for breastfeeding mothers as they do not affect the quantity or quality of breast milk and have no adverse effects on the infant. **Why the Other Options are Wrong (Contraindications):** According to the WHO Medical Eligibility Criteria (MEC Category 4): * **Liver Tumors (Benign or Malignant) and Acute Liver Disease:** Progestins are metabolized in the liver. In the presence of active liver disease (e.g., acute viral hepatitis, cirrhosis, or hepatoma), the metabolism of these hormones is impaired, potentially exacerbating the condition. * **Known Breast Cancer:** Breast cancer is often a hormone-sensitive tumor. Progestins may stimulate the growth of breast cancer cells; thus, any current breast malignancy is an absolute contraindication for all hormonal contraceptives. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism of Action:** The primary mechanism of POPs is **thickening of the cervical mucus**, which prevents sperm penetration. They also cause endometrial thinning. Unlike COCs, they do not consistently inhibit ovulation (ovulation is inhibited in only ~60-80% of cycles). * **The "3-Hour Rule":** POPs must be taken at the same time every day. A delay of more than 3 hours is considered a "missed pill." * **MEC Category 4 (Absolute Contraindication):** Current Breast Cancer is the most significant absolute contraindication for POPs.

Question 1

Which of the following is an absolute contraindication for combined oral contraceptive pills?

Accepted Answer

Previous history of thromboembolism

Answer

Diabetes mellitus

Answer

Migraine

Answer

Heart disease

Question 2

Progesterone-only pills act by which of the following mechanisms?

Accepted Answer

Thickening of cervical mucus

Answer

Inhibiting ovulation

Answer

Causing aseptic inflammation in the endometrium

Answer

Destruction of the embryo

Question 3

What is the mechanism of action of spermicides?

Accepted Answer

Disrupting cell membrane and motility

Answer

Activating acrosomal enzymes

Answer

Inhibiting glucose transport enzymes

Answer

Altering vaginal enzymes

Question 4

Which contraceptive method can prevent cervical cancer?

Accepted Answer

Condom

Answer

Oral Contraceptive Pill (OCP)

Answer

Mini Pills

Answer

Tubectomy

Question 5

Which of the following medications is used as a post-coital pill?

Accepted Answer

0.75 mg Levonorgestrel

Answer

25 mg Mifepristone

Answer

Misoprostol

Answer

10 mg Ethinylestradiol

Question 6

While using the "safe period" method for contraception, what is considered the unsafe period?

Accepted Answer

Days 12-18 of the menstrual cycle

Answer

Days 3-7 of the menstrual cycle

Answer

Days 7-21 of the menstrual cycle

Answer

Days 21-28 of the menstrual cycle

Question 7

What is the fertile period in a woman with a menstrual cycle length varying between 26 to 31 days?

Accepted Answer

Days 8 to 21 of the cycle

Answer

Days 15 to 25 of the cycle

Answer

Days 5 to 15 of the cycle

Answer

The first 5 days of the cycle

Question 8

After withdrawal of DMPA, most women conceive within what timeframe?

Accepted Answer

1 year

Answer

Immediately

Answer

2-4 weeks

Answer

6 months

Question 9

A woman is taking very low-dose combined oral contraceptive pills. After missing to take pills for how many consecutive days is there a failure of the contraceptive method?

Accepted Answer

Two missed pills

Answer

One missed pill

Answer

Three missed pills

Answer

Four missed pills

Question 10

Use of progestin-only pills as a mode of contraception is contraindicated in all of the following conditions, EXCEPT:

Accepted Answer

Lactation

Answer

Liver tumors

Answer

Acute liver disease

Answer

Known breast cancer

Contraception and Family Planning — MCQs

Contraception and Family Planning — MCQs

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