A 34-year-old woman presents at 6 weeks of delivery. She wants contraception for the next 3 years. What will be the best contraceptive method in this case?
Q2
A GSP4 woman comes for routine sonography for the first time. She has four daughters and expresses a desire for a boy this time, asking for sex determination. To abide by ethical guidelines, what should you do?
Q3
What is the typical time between fertilization and implantation?
Q4
A female patient missed her oral contraceptive pill (OCP) on four different days during the first two weeks of her menstrual cycle. What is the most appropriate advice for her?
Q5
A 31-year-old woman, gravida 1, para 0, at 28 weeks' gestation comes to the obstetrician for a prenatal visit. She has had a tingling pain in the thumb, index finger, and middle finger of her right hand for the past 6 weeks. Physical examination shows decreased sensation to pinprick touch on the thumb, index finger, middle finger, and lateral half of the ring finger of the right hand. The pain is reproduced when the dorsal side of each hand is pressed against each other. Which of the following additional findings is most likely in this patient?
Q6
A 36-year-old Asian G4P3 presents to her physician with a recently diagnosed pregnancy for a first prenatal visit. The estimated gestational age is 5 weeks. She had 2 vaginal deliveries and 1 medical abortion. Her children had birth weights of 4100 g and 4560 g. Her medical history is significant for gastroesophageal reflux disease, for which she takes pantoprazole. The pre-pregnancy weight is 78 kg (172 lb), and the weight at the time of presentation is 79 kg (174 lb). Her height is 157 cm (5 ft 1 in). Her vital signs are as follows: blood pressure 130/80 mm Hg, heart rate 75/min, respiratory rate 13/min, and temperature 36.7℃ (98℉). Her physical examination is unremarkable except for increased adiposity. Which of the following tests is indicated in this woman?
Q7
A 17-year-old woman with no significant past medical history presents to the outpatient OB/GYN clinic with her parents for concerns of primary amenorrhea. She denies any symptoms and appears relatively unconcerned about her presentation. The review of systems is negative. Physical examination demonstrates an age-appropriate degree of development of secondary sexual characteristics, and no significant abnormalities on heart, lung, or abdominal examination. Her vital signs are all within normal limits. Her parents are worried and request that the appropriate laboratory tests are ordered. Which of the following tests is the best next step in the evaluation of this patient’s primary amenorrhea?
Q8
A 36-year-old primigravid woman at 8 weeks' gestation comes to the emergency department because of vaginal bleeding and mild suprapubic pain 1 hour ago. The bleeding has subsided and she has mild, brown spotting now. Her medications include folic acid and a multivitamin. She smoked one pack of cigarettes daily for 10 years and drank alcohol occasionally but stopped both 6 weeks ago. Her temperature is 37°C (98.6°F), pulse is 92/min, and blood pressure is 116/77 mm Hg. Pelvic examination shows a closed cervical os and a uterus consistent in size with an 8-week gestation. Ultrasonography shows an intrauterine pregnancy and normal fetal cardiac activity. Which of the following is the most appropriate next step in management?
Q9
A 23-year-old woman presents to a medical office for a check-up. The patient has a 5-year history of epilepsy with focal-onset motor seizures and currently is seizure-free on 50 mg of lamotrigine 3 times a day. She does not have any concurrent illnesses and does not take other medications, except oral contraceptive pills. She is considering pregnancy and seeks advice on possible adjustments or additions to her therapy. Which of the following changes should be made?
Q10
A 28-year-old G1P0 woman who is 30 weeks pregnant presents to the women's health center for a prenatal checkup. She is concerned that her baby is not moving as much as usual over the past five days. She thinks she only felt the baby move eight times over an hour long period. Her prenatal history was notable for morning sickness requiring pyridoxine. Her second trimester ultrasound revealed no abnormal placental attachment. She takes a multivitamin daily. Her temperature is 98.6°F (37°C), blood pressure is 120/70 mmHg, pulse is 80/min, and respirations are 16/min. The patient's physical exam is unremarkable. Her fundal height is 28 cm, compared to 26 cm two weeks ago. The fetal pulse is 140/min. The patient undergoes external fetal monitoring. With vibroacoustic stimulation, the patient feels eight movements over two hours. What is the best next step in management?
Prenatal Care US Medical PG Practice Questions and MCQs
Question 1: A 34-year-old woman presents at 6 weeks of delivery. She wants contraception for the next 3 years. What will be the best contraceptive method in this case?
A. Nothing besides lactation amenorrhea
B. IUCD with progesterone
C. Injectable progesterone
D. Copper T (Correct Answer)
Explanation: ***Copper T***
- A **Copper T intrauterine device (IUD)** is an excellent choice for long-term contraception (up to 10 years), making it suitable for her 3-year requirement.
- It's **non-hormonal**, making it safe for breastfeeding mothers and avoiding potential hormonal side effects.
*Nothing besides lactation amenorrhea*
- **Lactational amenorrhea method (LAM)** is effective for only the first six months postpartum, provided the mother is exclusively breastfeeding and her periods have not returned.
- It is not a reliable method for contraception beyond six months postpartum or for the requested 3-year duration.
*IUCD with progesterone*
- An **intrauterine device (IUD) with progesterone** (e.g., Mirena) can be a good long-term option, but it releases hormones which can potentially affect breastfeeding, especially if initiated very early postpartum.
- While generally safe for breastfeeding, a non-hormonal option like the copper T is often preferred if there are concerns about hormonal exposure or side effects.
*Injectable progesterone*
- **Injectable progesterone** (e.g., Depo-Provera) is an effective contraceptive, but it needs to be administered every 3 months.
- While safe for breastfeeding, it's not considered as convenient for a 3-year duration as a single-insertion IUD, and some women experience side effects like irregular bleeding or weight gain.
Question 2: A GSP4 woman comes for routine sonography for the first time. She has four daughters and expresses a desire for a boy this time, asking for sex determination. To abide by ethical guidelines, what should you do?
A. Check routine ANC and sex for developmental abnormalities and do not reveal gender to the patient (Correct Answer)
B. Check routine ANC and sex for developmental abnormalities and do reveal gender to the patient
C. Do reveal gender if a girl
D. Check only routine ANC, do not check sex
Explanation: ***Check routine ANC and sex for developmental abnormalities and do not reveal gender to the patient***
- It is **illegal** and **unethical** to reveal the sex of the fetus in many countries, including India, to prevent **sex-selective abortions**.
- The primary purpose of a routine antenatal ultrasound is to assess fetal **health** and **developmental abnormalities**, not to determine sex for parental preference.
*Check routine ANC and sex for developmental abnormalities and do reveal gender to the patient*
- Revealing the gender to the patient directly facilitates **sex-selective abortion**, which is medically unethical and illegal due to the potential for harm to the fetus and society.
- This practice would violate the **Pre-Conception and Pre-Natal Diagnostic Techniques (PCPNDT) Act** in India, which prohibits gender determination.
*Do reveal gender if a girl*
- Revealing the gender, regardless of whether it is a boy or a girl, can lead to **gender-biased selective abortions**, particularly in cultures with a strong preference for male offspring.
- This action undermines the ethical principles of **non-maleficence** and **justice** by potentially facilitating harm based on gender preference.
*Check only routine ANC, do not check sex*
- While the primary focus is routine antenatal care, avoiding the assessment of fetal sex entirely could lead to **missing potential developmental abnormalities** that might be identifiable through observation of external genitalia.
- A thorough ultrasound examination routinely includes a visual check of fetal anatomy, which can incidentally reveal gender, but this information should not be shared with the parents for selection purposes.
Question 3: What is the typical time between fertilization and implantation?
A. 2 days
B. 8 days (Correct Answer)
C. 14 days
D. 16 days
Explanation: ***8 days***
- **Fertilization** typically occurs in the **fallopian tube**, and the resulting **zygote** then undergoes several cell divisions while migrating towards the uterus.
- Implantation, the process by which the **blastocyst embeds into the uterine wall**, usually begins around day 6 post-fertilization and is completed by day 8-10.
*2 days*
- At 2 days post-fertilization, the embryo is typically in the **2-cell to 4-cell stage** and is still located within the fallopian tube, far from the implantation site.
- This stage is too early for implantation to occur, as the embryo has not yet reached the **blastocyst stage** or the uterus.
*14 days*
- By 14 days post-fertilization, implantation would have long been completed, and the initial stages of **trophoblast development** and formation of the **placenta** would be underway.
- This time frame represents a more advanced stage of pregnancy, whereas implantation is an early event.
*16 days*
- Sixteen days post-fertilization is well past the window for initial implantation; at this point, significant embryonic development has occurred, and the woman might even be experiencing early signs of **pregnancy**, such as a missed period.
- Implantation is a much earlier process, concluding by day 10 at the latest.
Question 4: A female patient missed her oral contraceptive pill (OCP) on four different days during the first two weeks of her menstrual cycle. What is the most appropriate advice for her?
A. Adopt another method of contraception
B. Continue taking the pill
C. Continue current pack, consider additional contraceptive method for remaining days (Correct Answer)
D. Take all 4 pills at once and continue taking pills
Explanation: **Continue current pack, consider additional contraceptive method for remaining days**
- Missing four pills in the first two weeks significantly compromises contraceptive efficacy, necessitating the use of **backup contraception** (like condoms) for the remainder of the cycle.
- Continuing the current pack is important to maintain hormonal rhythm and prevent unscheduled bleeding, but it won't immediately restore full protection.
*Adopt another method of contraception*
- While a backup method is needed, she doesn't necessarily need to **completely abandon** OCPs, especially if she has previously tolerated them well.
- The immediate concern is the current cycle's protection; a long-term change in method might be considered if adherence is a persistent issue.
*Continue taking the pill*
- Simply continuing the pill without additional measures is **insufficient** as the contraceptive effectiveness has been significantly compromised by missing multiple doses.
- This approach would leave her at a **high risk of pregnancy** during the current cycle.
*Take all 4 pills at once and continue taking pills*
- Taking multiple missed pills at once is **not recommended** and can lead to **nausea, vomiting**, or irregular bleeding due to a sudden high dose of hormones.
- This strategy would not restore contraceptive efficacy effectively and would increase side effects without providing better protection.
Question 5: A 31-year-old woman, gravida 1, para 0, at 28 weeks' gestation comes to the obstetrician for a prenatal visit. She has had a tingling pain in the thumb, index finger, and middle finger of her right hand for the past 6 weeks. Physical examination shows decreased sensation to pinprick touch on the thumb, index finger, middle finger, and lateral half of the ring finger of the right hand. The pain is reproduced when the dorsal side of each hand is pressed against each other. Which of the following additional findings is most likely in this patient?
A. Palmar nodule
B. Wrist drop
C. Hypothenar weakness
D. Interosseus wasting
E. Thenar atrophy (Correct Answer)
Explanation: ***Thenar atrophy***
- The patient's symptoms (tingling pain in the **thumb, index, and middle fingers**, decreased sensation in these digits, and pain reproduced by pressing the dorsal sides of the hands together - **Phalen's sign**) are classic for **carpal tunnel syndrome (CTS)**.
- As **carpal tunnel syndrome** progresses, **median nerve** compression can lead to **atrophy of the thenar muscles** (which are innervated by the median nerve) due to chronic denervation.
*Palmar nodule*
- A **palmar nodule** is characteristic of **Dupuytren's contracture**, a fibrotic condition of the palmar fascia.
- This condition is not associated with the nerve compression symptoms described in the patient.
*Wrist drop*
- **Wrist drop** is a clinical manifestation of **radial nerve injury**, typically affecting the extensor muscles of the wrist and fingers.
- The patient's symptoms localize to the median nerve distribution, not the radial nerve.
*Hypothenar weakness*
- **Hypothenar weakness** indicates **ulnar nerve compression** or injury, affecting the muscles responsible for the movement of the little finger and some intrinsic hand muscles.
- The symptoms described are clearly within the **median nerve distribution**, not the ulnar nerve.
*Interosseus wasting*
- **Interosseus wasting** is primarily a sign of **ulnar nerve damage**, affecting the small muscles between the metacarpals that help with finger abduction and adduction.
- Again, the patient's symptoms of carpal tunnel syndrome are due to **median nerve compression**, not ulnar nerve pathology.
Question 6: A 36-year-old Asian G4P3 presents to her physician with a recently diagnosed pregnancy for a first prenatal visit. The estimated gestational age is 5 weeks. She had 2 vaginal deliveries and 1 medical abortion. Her children had birth weights of 4100 g and 4560 g. Her medical history is significant for gastroesophageal reflux disease, for which she takes pantoprazole. The pre-pregnancy weight is 78 kg (172 lb), and the weight at the time of presentation is 79 kg (174 lb). Her height is 157 cm (5 ft 1 in). Her vital signs are as follows: blood pressure 130/80 mm Hg, heart rate 75/min, respiratory rate 13/min, and temperature 36.7℃ (98℉). Her physical examination is unremarkable except for increased adiposity. Which of the following tests is indicated in this woman?
A. Serology for CMV
B. Coagulogram
C. Glucose oral tolerance test (Correct Answer)
D. Liver enzyme assessment
E. Human chorionic gonadotropin and pregnancy-associated plasma protein-A
Explanation: ***Glucose oral tolerance test***
- This patient has several risk factors for **gestational diabetes mellitus (GDM)**, including advanced maternal age (>25, she is 36), high pre-pregnancy BMI (31.6 kg/m$^2$), and two prior deliveries with **macrosomic infants** (**>4000g**).
- Given these risk factors, an **early screening for GDM** with a glucose oral tolerance test is indicated.
*Serology for CMV*
- **Cytomegalovirus (CMV) serology** is generally not routinely recommended for all pregnant women unless there is specific clinical suspicion or exposure.
- While CMV can cause congenital infection, the patient's history does not suggest any particular risk for CMV beyond the general population.
*Coagulogram*
- A **coagulogram** (e.g., PT, aPTT, fibrinogen) is not routinely performed in healthy pregnant women at their initial prenatal visit.
- It would only be indicated if there was a history of **bleeding disorders**, recurrent pregnancy loss, or other specific medical conditions suggesting a coagulopathy.
*Liver enzyme assessment*
- **Liver enzyme assessment** is not a routine screening test for all pregnant women.
- It would be indicated for conditions like **preeclampsia** with severe features, intrahepatic cholestasis of pregnancy, or concerns about drug-induced liver injury, none of which are suggested by the current presentation.
*Human chorionic gonadotropin and pregnancy-associated plasma protein-A*
- These are markers used in **first-trimester screening for aneuploidy** (e.g., Down syndrome), often combined with nuchal translucency ultrasound.
- While aneuploidy screening is offered to all pregnant women, the question specifically asks for a test indicated due to her medical and obstetric history, pointing more towards metabolic risks.
Question 7: A 17-year-old woman with no significant past medical history presents to the outpatient OB/GYN clinic with her parents for concerns of primary amenorrhea. She denies any symptoms and appears relatively unconcerned about her presentation. The review of systems is negative. Physical examination demonstrates an age-appropriate degree of development of secondary sexual characteristics, and no significant abnormalities on heart, lung, or abdominal examination. Her vital signs are all within normal limits. Her parents are worried and request that the appropriate laboratory tests are ordered. Which of the following tests is the best next step in the evaluation of this patient’s primary amenorrhea?
A. Pelvic ultrasound
B. Serum beta hCG (Correct Answer)
C. Serum prolactin
D. Serum FSH
E. Left hand radiograph
Explanation: ***Serum beta hCG***
- It is crucial to rule out **pregnancy** as a cause of amenorrhea in any patient of reproductive age, even in the absence of intercourse history.
- A positive result would immediately explain the amenorrhea and necessitate further obstetric care.
*Pelvic ultrasound*
- While useful for evaluating uterine and ovarian anatomy, it is not the *first* step when pregnancy has not been ruled out.
- It would be more appropriate if there were concerns for **structural abnormalities** after initial lab work.
*Serum prolactin*
- This test is indicated if there are symptoms suggesting **hyperprolactinemia**, such as galactorrhea or headaches, which are absent here.
- High prolactin can inhibit GnRH release, leading to amenorrhea, but it's not the initial screening test.
*Serum FSH*
- FSH levels are important for assessing **ovarian function** and diagnosing conditions like primary ovarian insufficiency.
- However, in a patient with normal secondary sexual characteristics, other more common causes should be ruled out first.
*Left hand radiograph*
- A left hand radiograph is used to assess **bone age**, primarily in cases of delayed puberty or growth concerns.
- This patient has age-appropriate secondary sexual characteristics, suggesting **bone age** is likely consistent with her chronological age.
Question 8: A 36-year-old primigravid woman at 8 weeks' gestation comes to the emergency department because of vaginal bleeding and mild suprapubic pain 1 hour ago. The bleeding has subsided and she has mild, brown spotting now. Her medications include folic acid and a multivitamin. She smoked one pack of cigarettes daily for 10 years and drank alcohol occasionally but stopped both 6 weeks ago. Her temperature is 37°C (98.6°F), pulse is 92/min, and blood pressure is 116/77 mm Hg. Pelvic examination shows a closed cervical os and a uterus consistent in size with an 8-week gestation. Ultrasonography shows an intrauterine pregnancy and normal fetal cardiac activity. Which of the following is the most appropriate next step in management?
A. Reassurance and follow-up ultrasonography (Correct Answer)
B. Progestin therapy
C. Complete bed rest
D. Low-dose aspirin therapy
E. Cervical cerclage
Explanation: ***Reassurance and follow-up ultrasonography***
- The patient's symptoms of **mild vaginal bleeding** at 8 weeks' gestation with a **closed cervical os**, a uterus consistent with gestational age, and **normal fetal cardiac activity** on ultrasound indicate a **threatened abortion** which has largely resolved.
- In such cases, the current management involves reassuring the patient that the pregnancy is likely to continue and scheduling a follow-up ultrasound to confirm continued fetal well-being, as there is no intervention proven to alter the outcome.
*Progestin therapy*
- While progesterone has a role in maintaining pregnancy, routine progestin therapy for resolved or mild threatened abortion is **not universally recommended** unless there is a documented **progesterone deficiency** or specific risk factors like a history of recurrent miscarriage.
- In this case, the bleeding has subsided and fetal viability is confirmed.
*Complete bed rest*
- Historically, bed rest was a common recommendation for threatened abortion, but studies have demonstrated **no benefit** in preventing miscarriage and it can even lead to complications such as **thrombophlebitis** and **muscle atrophy**.
- Current evidence-based guidelines do not support complete bed rest for threatened abortion.
*Low-dose aspirin therapy*
- Low-dose aspirin is primarily used in pregnancy for conditions like **antiphospholipid syndrome** or for the prevention of **preeclampsia** in high-risk women.
- There is **no indication** for low-dose aspirin in the management of threatened abortion without these specific risk factors.
*Cervical cerclage*
- **Cervical cerclage** is a procedure used to reinforce an incompetent cervix, typically for women with a history of **recurrent second-trimester losses** or a **shortened cervical length** identified on ultrasound.
- It is **not indicated** for threatened abortion in the first trimester, especially when the cervical os is closed and no signs of cervical insufficiency are present.
Question 9: A 23-year-old woman presents to a medical office for a check-up. The patient has a 5-year history of epilepsy with focal-onset motor seizures and currently is seizure-free on 50 mg of lamotrigine 3 times a day. She does not have any concurrent illnesses and does not take other medications, except oral contraceptive pills. She is considering pregnancy and seeks advice on possible adjustments or additions to her therapy. Which of the following changes should be made?
A. Recommend 5 mg of folic acid daily with no changes to antiepileptic therapy (Correct Answer)
B. Recommend 100 μg of vitamin K daily with no changes to antiepileptic therapy
C. Decrease the dose of lamotrigine to 50 mg 2 times a day
D. No changes or additions to the patient’s regimen are indicated
E. Change lamotrigine to oxcarbazepine prior to conception
Explanation: ***Recommend 5 mg of folic acid daily with no changes to antiepileptic therapy***
- All women of childbearing age taking antiepileptic drugs (AEDs) who are planning pregnancy should take **high-dose folic acid (4-5 mg daily)** to reduce the risk of **neural tube defects**.
- **Lamotrigine** is generally considered one of the safer AEDs during pregnancy, and changing a well-controlled regimen can lead to breakthrough seizures, posing risks to both mother and fetus.
*Recommend 100 μg of vitamin K daily with no changes to antiepileptic therapy*
- **Vitamin K supplementation** is primarily recommended in the **third trimester** for women taking AEDs (especially enzyme-inducing ones like carbamazepine, phenytoin, and phenobarbital) to prevent **neonatal coagulopathy**.
- While lamotrigine is not a potent enzyme inducer, a general recommendation for vitamin K can be considered, but **folic acid supplementation is a more immediate and critical consideration** *before* conception and throughout the first trimester.
*Decrease the dose of lamotrigine to 50 mg 2 times a day*
- **Decreasing the lamotrigine dosage** without clinical indication could lead to a **breakthrough seizure**, which poses a significant risk to both the mother and the developing fetus.
- **Seizure control** is paramount during pregnancy, and dose adjustments should only be made if clinically necessary due to side effects or if lamotrigine levels decrease, which often requires *increasing* the dose due to hormonal changes.
*No changes or additions to the patient’s regimen are indicated*
- This is incorrect as **folic acid supplementation** is strongly recommended for all women taking AEDs who are planning pregnancy due to the increased risk of neural tube defects.
- Failure to initiate folic acid supplementation would expose the fetus to preventable risks, despite the patient being otherwise healthy and seizure-free.
*Change lamotrigine to oxcarbazepine prior to conception*
- **Changing an effective AED** when the patient is seizure-free can destabilize seizure control, potentially leading to breakthrough seizures.
- While oxcarbazepine is an alternative AED, there is no compelling reason to switch from lamotrigine, which is generally considered **relatively safe in pregnancy** and is effectively controlling this patient's seizures.
Question 10: A 28-year-old G1P0 woman who is 30 weeks pregnant presents to the women's health center for a prenatal checkup. She is concerned that her baby is not moving as much as usual over the past five days. She thinks she only felt the baby move eight times over an hour long period. Her prenatal history was notable for morning sickness requiring pyridoxine. Her second trimester ultrasound revealed no abnormal placental attachment. She takes a multivitamin daily. Her temperature is 98.6°F (37°C), blood pressure is 120/70 mmHg, pulse is 80/min, and respirations are 16/min. The patient's physical exam is unremarkable. Her fundal height is 28 cm, compared to 26 cm two weeks ago. The fetal pulse is 140/min. The patient undergoes external fetal monitoring. With vibroacoustic stimulation, the patient feels eight movements over two hours. What is the best next step in management?
A. Biophysical profile (Correct Answer)
B. Induction of labor
C. Inpatient monitoring
D. Reassurance
E. Oxytocin challenge
Explanation: ***Biophysical profile***
- The patient reports **decreased fetal movement** and a non-reassuring modified count, requiring further evaluation of fetal well-being.
- A **biophysical profile** combines a non-stress test with an ultrasound assessment of fetal breathing, movement, tone, and amniotic fluid volume to provide a comprehensive picture of fetal health.
*Induction of labor*
- **Induction of labor** is typically reserved for cases with confirmed fetal distress or when the risks of continuing the pregnancy outweigh the benefits, which is not yet established.
- While fetal well-being is a concern, there is no immediate indication for delivery before further diagnostic tests.
*Inpatient monitoring*
- **Inpatient monitoring** may be considered if initial outpatient assessments like a non-stress test or biophysical profile are non-reassuring, but it is not the immediate next step.
- The patient’s current vital signs and fundal height are within normal limits, and the most recent fetal heart rate is reassuring, so continuous inpatient monitoring is premature.
*Reassurance*
- **Reassurance** alone is insufficient given the patient's concern about decreased fetal movement and the non-reassuring result of 8 movements in 2 hours with vibroacoustic stimulation.
- Decreased fetal movement can be a sign of fetal compromise, necessitating objective assessment rather than just reassurance.
*Oxytocin challenge*
- An **oxytocin challenge test** (also known as a contraction stress test) is used to evaluate uteroplacental function by observing fetal heart rate response to contractions.
- It is typically performed if a non-stress test or biophysical profile is equivocal or non-reassuring, it is not the initial test of choice for decreased fetal movement.
