Prenatal Care Practice Questions

Q: Gestational sac can be seen using ultrasonography at the earliest by:

5th week. ***5th week*** - The **gestational sac** is typically the **first sonographic sign of an intrauterine pregnancy**. - It becomes reliably visible via **transvaginal ultrasound** when its mean diameter reaches 2-3 mm, which usually occurs around **5 weeks' gestational age**. *3rd week* - At **3 weeks' gestation**, the embryo is still at a very early stage of development, often a **blastocyst** or undergoing **implantation**. - It is **too small** to be visualized on routine ultrasound, and the gestational sac has not yet sufficiently developed. *4th week* - While implantation is usually complete by the end of the 4th week, the gestational sac is typically **not yet visible** or is **just barely perceptible** as a tiny fluid collection. - Visualization at this stage is often inconsistent and can be challenging, making the 5th week a more reliable earliest detection point. *8th week* - By **8 weeks' gestation**, the gestational sac would be **clearly visible** and much larger, often containing a fetal pole with a visible heartbeat. - This is well past the earliest time it can be detected.

Q: At which gestational age is urinary retention first observed in pregnancy?

10 weeks. ***10 weeks*** - Urinary retention can first be observed around **10 weeks of gestation** due to the growing uterus impinging on the bladder neck. - This period is also when **uterine retroversion** is more likely to cause urinary obstruction as the uterus ascends out of the pelvis. *18 weeks* - By 18 weeks, the uterus has typically risen out of the pelvis, generally **reducing the risk** of simple uterine impingement causing acute urinary retention. - While other urinary tract issues can arise, acute retention due to uterine position is less common at this stage. *22 weeks* - At 22 weeks, the uterus is significantly larger and well-situated in the abdomen, making mechanical compression of the bladder neck less likely as a primary cause of **acute urinary retention**. - More complex causes would likely be responsible if retention occurred at this gestational age. *34 weeks* - Late-term pregnancy at 34 weeks might present with increased urinary frequency and some overflow incontinence due to the large fetal head putting pressure on the bladder. - However, **acute urinary retention** due to uterine retroversion is typically not seen at this stage, as the uterus is fully abdominal.

Q: At 20 weeks of gestation amniotic fluid volume is?

200 ml. ***200 ml*** - At **20 weeks of gestation**, the average amniotic fluid volume is approximately **200 ml**, primarily derived from fetal urination. - This volume is crucial for **fetal development**, protecting against trauma and allowing for lung maturation. *400 ml* - An amniotic fluid volume of 400 ml is typically observed later in gestation, often around **24-28 weeks**, as fetal urination increases. - While still within a normal range for some stages, it's generally higher than the average at 20 weeks. *600 ml* - A volume of 600 ml is characteristic of the **late second trimester** to early third trimester, around **28-32 weeks**, when the fetus is significantly larger and producing more urine. - This value would be considered high for a 20-week gestation and could indicate **polyhydramnios** if significantly elevated. *800 ml* - This volume is usually seen in the **third trimester**, often peaking around **33-34 weeks**, reflecting maximal fetal urine output. - An amniotic fluid volume of 800 ml at 20 weeks would be a clear indication of **severe polyhydramnios**, which can be associated with various fetal anomalies.

Q: Fetal heart sounds (FHS) can usually be heard by Pinard's stethoscope at?

18 weeks. ***18 weeks*** - Fetal heart sounds (FHS) can typically be heard with a **Pinard's stethoscope (fetoscope)** between **18 and 20 weeks** of gestation. - This timing allows for sufficient fetal development and sound transmission through the uterine wall for auscultation by this conventional method. - This is an important milestone in routine prenatal care and examination. *14 weeks* - At 14 weeks, fetal heart sounds are generally **not audible** with a Pinard's stethoscope or fetoscope. - A **Doppler ultrasound** is usually required to detect fetal heart activity at this early stage (typically from 10-12 weeks). *22 weeks* - While FHS are audible at 22 weeks, **18 weeks represents the earliest typical timeframe** for detection with a Pinard's stethoscope. - By 22 weeks, FHS would be more readily heard, but this option does not reflect the usual initial detection window. *26 weeks* - FHS are clearly audible at 26 weeks, but this is **later than the typical initial detection** period. - Early detection around 18-20 weeks is important for routine prenatal care and clinical assessment.

Q: At which gestational week does the maximum volume of amniotic fluid occur?

36 weeks. ***36 weeks*** - The volume of **amniotic fluid** gradually increases during pregnancy, reaching its **peak** around **36 weeks** of gestation. - After 36 weeks, the volume of amniotic fluid typically begins to **decrease** as the pregnancy approaches term. *32 weeks* - At 32 weeks, the amniotic fluid volume is still **increasing** and has not yet reached its maximum level. - The fetus is actively growing and contributing to fluid production, but the peak is still several weeks away. *34 weeks* - Although significant, the amniotic fluid volume at 34 weeks has not yet reached its **maximum**. - The volume will continue to rise for another two weeks before plateauing and then declining. *40 weeks* - By 40 weeks, a normal-term pregnancy, the volume of amniotic fluid has typically **decreased** from its peak at 36 weeks. - A declining amniotic fluid volume (oligohydramnios) can be a concern at term if it's too low.

Q: A primigravida presents to you with anemia early in her pregnancy. She is 7 weeks pregnant as seen on ultrasound. Her hemoglobin level is 9 g/dL. When should the iron supplements be started for her?

Immediately upon diagnosis. ***Correct Option: Immediately upon diagnosis*** - **Iron deficiency anemia** in pregnancy (Hb <11 g/dL in first trimester) should be addressed promptly to prevent adverse maternal and fetal outcomes - Initiating treatment at 7 weeks ensures sustained **iron stores** throughout pregnancy - WHO and ACOG guidelines recommend **immediate supplementation** when anemia is diagnosed during antenatal screening - Early treatment prevents worsening due to physiological plasma volume expansion in second trimester *Incorrect Option: 8 to 10 weeks* - Delaying treatment for 1-3 weeks after diagnosis at 7 weeks is not justified medically - Any delay in treatment allows anemia to worsen and depletes maternal iron stores - Recommended practice is **immediate supplementation** if hemoglobin count is less than 11 g/dL during first two antenatal visits *Incorrect Option: After 14 weeks* - Waiting until second trimester (after 14 weeks) would allow the **anemia to worsen**, making it harder to correct before physiological drop in hemoglobin due to plasma volume expansion - Fetal development, particularly **neurological development**, is rapid in first trimester and iron is crucial during this period - Delaying 7 weeks after diagnosis risks maternal complications and suboptimal fetal development *Incorrect Option: After 20 weeks* - Starting supplementation this late (13 weeks after diagnosis) would result in severe maternal iron deficiency - Significant **fetal iron demands** increase by third trimester, making it difficult to replete maternal stores if supplementation starts this late - **Severe anemia** poses risks such as **preterm birth**, low birth weight, and **postpartum hemorrhage**

Q: A pregnant woman comes to the clinic. She has previously delivered twins. What is the correct representation of her obstetric score?

G2P1 (2 pregnancies, 1 delivery). ***G2P1 (2 pregnancies, 1 delivery)*** - **Gravidity (G)** refers to the total number of times a woman has been pregnant, regardless of outcome. This patient has been pregnant **twice**: once previously (resulting in twins) and once currently. - **Parity (P)** refers to the number of deliveries after 20 weeks gestation. Multiple gestation (twins, triplets) counts as **ONE delivery**, not separate deliveries. Therefore, her previous twin delivery = **P1**. - Current pregnancy status: She is currently pregnant (contributes to gravidity) but has not yet delivered this pregnancy (does not contribute to parity yet). *G3P1 (3 pregnancies, 1 delivery)* - This incorrectly counts the current pregnancy as if she has been pregnant three times total. - The parity is correct (1 delivery), but gravidity is overestimated. *G3P2 (3 pregnancies, 2 deliveries)* - This makes two errors: incorrectly counting three total pregnancies AND incorrectly counting the twin delivery as two separate deliveries. - Remember: multiple gestation = one delivery event, not multiple deliveries. *G2P2 (2 pregnancies, 2 deliveries)* - Gravidity is correct (2 pregnancies total), but this incorrectly counts the twin delivery as two separate deliveries. - Parity should be 1, not 2, because delivering twins is a single delivery event.

Q: A woman with an obstetric score of G2P1 comes to the clinic at 14 weeks of gestation for her antenatal checkup. A uterine artery doppler was suggested by the doctor. What would it detect?

Risk of early-onset preeclampsia. **Risk of early-onset preeclampsia** - **Uterine artery Doppler** at 11-14 weeks of gestation is used to screen for **preeclampsia risk**, particularly **early-onset preeclampsia**, which is associated with impaired placental development. - An increased **pulsatility index (PI)** or presence of **bilateral notching** in the uterine arteries indicates high resistance to blood flow, suggesting a higher risk of developing this condition. *Risk of late-onset preeclampsia* - While uterine artery Doppler can indicate a general risk for preeclampsia, its predictive value is significantly lower for **late-onset preeclampsia** (after 34 weeks). - Late-onset preeclampsia often has different underlying causes, not solely related to abnormal **trophoblast invasion** detectable by early Doppler. *Risk of placenta accreta* - **Placenta accreta** is typically associated with previous **cesarean sections** or other uterine surgeries, leading to abnormal placental implantation. - It is diagnosed by the absence of a clear retroplacental hypoechoic zone and features such as **lacunae** on **ultrasound**, not primarily by uterine artery Doppler. *Fetal growth restriction risk* - Uterine artery Doppler at 11-14 weeks can offer some indication of **fetal growth restriction (FGR)** risk, particularly if severe and related to **placental insufficiency**. - However, the primary surveillance for FGR later in pregnancy often involves **umbilical artery Doppler** and fetal biometry, not solely early uterine artery Doppler.

Q: Which clinical sign indicates the softening of the isthmus of the uterus, leading to a sensation of separation between the cervix and the body of the uterus during early pregnancy (6-8 weeks of gestation)?

Hegar's sign. ***Hegar's sign*** - Hegar's sign is the detection of **softening of the lower uterine segment (isthmus)** during a bimanual examination around 6-8 weeks of gestation. - This softening allows the examining fingers to almost meet between the cervix and the body of the uterus, giving a sensation of **separation** between the two. *Goodell's sign (softening of the cervix)* - Goodell's sign refers specifically to the **softening of the cervix** itself due to increased vascularity and edema in early pregnancy. - It does not involve the softening of the uterine isthmus or the sensation of separation between the cervix and the uterine body. *Chadwick's sign* - Chadwick's sign is the **bluish discoloration of the cervix, vagina, and labia** caused by increased blood flow (vascularity) during early pregnancy. - It is a visual sign of pregnancy and does not involve the palpation of uterine softening or separation. *Piskacek's sign* - Piskacek's sign describes an **asymmetrical enlargement** of the uterus when implantation occurs near one of the uterine cornua. - This results in a palpable **soft, irregular bulge** on one side of the uterus, rather than a generalized softening of the isthmus.

Question 1

Gestational sac can be seen using ultrasonography at the earliest by:

Accepted Answer

5th week

Answer

3rd week

Answer

4th week

Answer

8th week

Question 2

At which gestational age is urinary retention first observed in pregnancy?

Accepted Answer

10 weeks

Answer

18 weeks

Answer

22 weeks

Answer

34 weeks

Question 3

At 20 weeks of gestation amniotic fluid volume is?

Accepted Answer

200 ml

Answer

600 ml

Answer

400 ml

Answer

800 ml

Question 4

Fetal heart sounds (FHS) can usually be heard by Pinard's stethoscope at?

Accepted Answer

18 weeks

Answer

14 weeks

Answer

22 weeks

Answer

26 weeks

Question 5

Which of the following is a physiological change of pregnancy in the urinary bladder?

Accepted Answer

Pressure on bladder in late pregnancy

Answer

Stress incontinence

Answer

Edematous mucosa

Answer

Increased frequency at 14 weeks

Question 6

At which gestational week does the maximum volume of amniotic fluid occur?

Accepted Answer

36 weeks

Answer

32 weeks

Answer

34 weeks

Answer

40 weeks

Question 7

A primigravida presents to you with anemia early in her pregnancy. She is 7 weeks pregnant as seen on ultrasound. Her hemoglobin level is 9 g/dL. When should the iron supplements be started for her?

Accepted Answer

Immediately upon diagnosis

Answer

8 to 10 weeks

Answer

After 14 weeks

Answer

After 20 weeks

Question 8

A pregnant woman comes to the clinic. She has previously delivered twins. What is the correct representation of her obstetric score?

Accepted Answer

G2P1 (2 pregnancies, 1 delivery)

Answer

G3P1 (3 pregnancies, 1 delivery)

Answer

G3P2 (3 pregnancies, 2 deliveries)

Answer

G2P2 (2 pregnancies, 2 deliveries)

Question 9

A woman with an obstetric score of G2P1 comes to the clinic at 14 weeks of gestation for her antenatal checkup. A uterine artery doppler was suggested by the doctor. What would it detect?

Accepted Answer

Risk of early-onset preeclampsia

Answer

Risk of late-onset preeclampsia

Answer

Risk of placenta accreta

Answer

Fetal growth restriction risk

Question 10

Which clinical sign indicates the softening of the isthmus of the uterus, leading to a sensation of separation between the cervix and the body of the uterus during early pregnancy (6-8 weeks of gestation)?

Accepted Answer

Hegar's sign

Answer

Chadwick's sign

Answer

Piskacek's sign

Answer

Goodell's sign (softening of the cervix)

Prenatal Care — MCQs

Prenatal Care — MCQs

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