Labor and Delivery Practice Questions

Q: What is considered an abnormal fetal scalp blood pH level that necessitates urgent intervention?

pH 7.15. ***pH 7.15*** - A fetal scalp blood pH of **7.15** (representing pH <7.20) indicates **significant fetal acidosis** and requires **urgent intervention**, such as expedited delivery. - The critical threshold is **pH <7.20**; values below this suggest **fetal compromise** with high risk of adverse neonatal outcomes, necessitating immediate action. - pH values **<7.15** are considered **severe acidosis** requiring emergency delivery. *pH 7.4* - A pH of 7.4 is considered a **normal** and healthy fetal scalp blood pH (normal range: 7.25-7.35). - This indicates **no acidosis or compromise**, with the fetus being well-oxygenated. *pH 7.3* - A pH of 7.3 is within the **normal range** (7.25-7.35) for fetal scalp blood. - This represents **adequate fetal oxygenation** with no intervention required. *pH 7.35* - A pH of 7.35 is at the **upper end of the normal physiological range** for fetal scalp blood. - This level indicates **excellent fetal oxygenation** and acid-base balance with no interventions required.

Q: True labor pain includes all of the following except.

Formation of the bag of waters. ***Formation of the bag of waters*** - The **bag of waters** (amniotic sac) forms during pregnancy, not during labor itself. Its formation is not a component or feature of true labor. - While **rupture of membranes** may occur during labor, the formation of the bag of waters happens well before labor begins. - This is the correct answer as it is NOT included in true labor pain characteristics. *Painful uterine contractions* - **Painful, regular uterine contractions** are the hallmark of true labor, distinguishing it from false labor (Braxton Hicks contractions). - These contractions progressively increase in frequency, intensity, and duration, and are not relieved by rest or position changes. *Cervical dilation* - **Cervical dilation** (and effacement) is the most critical diagnostic criterion for true labor, representing progressive physiological changes. - True labor always leads to measurable cervical changes, unlike false labor. *Show (mucus plug discharge)* - The **"show"** refers to the passage of blood-tinged mucus from the cervical canal as it begins to dilate and efface. - This is a classic sign of true labor onset and represents the dislodgement of the mucus plug that sealed the cervical canal during pregnancy.

Q: The definite sign of placental separation in stage 3 of parturition is

Lengthening of cord. ***Lengthening of cord*** - As the placenta detaches from the uterine wall and descends, the **umbilical cord will appear to lengthen** at the vulva, indicating that it has partially or fully entered the lower uterine segment or vagina. - This lengthening is a direct physical sign that the placenta has separated and is moving out of the uterus, making it a **definitive sign** of placental separation. *Uterine contraction* - **Uterine contractions** are necessary for placental separation, as they reduce the size of the placental bed, causing it to detach. - However, contractions alone do not definitively prove separation; the placenta may still be attached even with strong contractions. *Increase of BP* - An **increase in blood pressure (BP)** is not a direct or reliable sign of placental separation. - Blood pressure changes during labor and the third stage can be influenced by various factors, including pain, anxiety, and medication, making it an unreliable indicator. *Descent of placenta into vagina* - While the **descent of the placenta into the vagina** is a sign that separation has occurred, it is a later event. - The crucial "definite sign" of *separation* itself is often observed earlier via the lengthening of the cord and a gush of blood, indicating that detachment has occurred within the uterus.

Q: A 25-year-old, 2nd gravida arrives in the labor room at full dilation. Which of the following practices is contraindicated at this stage of labor?

Liberal prophylactic use of ergometrine. ***Liberal prophylactic use of ergometrine*** - **Ergometrine is CONTRAINDICATED at full dilation** (second stage of labor) because it causes **strong, sustained tetanic uterine contractions**. - If given before delivery of the baby, these tetanic contractions can: - **Trap the fetus** inside the uterus - Compromise **uteroplacental blood flow** leading to fetal hypoxia - Increase risk of **uterine rupture** - Impede normal progress of labor - Ergometrine is reserved for **third stage management** (after delivery of baby) for prevention of postpartum hemorrhage, NOT for use during active labor at full dilation. - **Oxytocin** is preferred over ergometrine even in third stage due to better safety profile. *Cord blood to be saved in 2 tubes - plain & EDTA* - Collecting **cord blood** for banking or analysis is not contraindicated at full dilation. - This is routinely done at the time of delivery using appropriate collection tubes (plain for serum studies, EDTA for cell counts). - This practice does not interfere with labor management. *Early clamping of cord* - While **delayed cord clamping** (30-60 seconds) is now preferred for improved neonatal outcomes (better iron stores, higher hemoglobin levels), early clamping is **not contraindicated**. - Early clamping may still be indicated in specific situations such as need for immediate neonatal resuscitation, placental abruption, or maternal instability. - The timing of cord clamping is decided at delivery, not at full dilation. *Avoidance of manual removal of placenta* - **Manual removal of placenta** is reserved for retained placenta (failure to deliver within 30 minutes after baby) that doesn't respond to conservative management. - Avoiding unnecessary manual removal reduces risk of infection, hemorrhage, and uterine trauma. - This is appropriate management, not a contraindicated practice at full dilation.

Q: When a fetus is in an attitude of flexion, which presentation is most likely?

Cephalic. ***Cephalic*** - An **attitude of flexion** is the normal fetal attitude where the head is flexed onto the chest, with the chin tucked, and the limbs are flexed towards the body. This attitude is characteristic of a **cephalic presentation**. - In a cephalic presentation, the **head is the presenting part** to the maternal pelvis, aligning with the fetus being in a flexed attitude. *Brow* - In a brow presentation, the fetal head is **partially extended**, with the brow being the presenting part. This is an abnormal attitude, not one of complete flexion. - This presentation often leads to **labor dystocia** due to the larger presenting diameter of the head. *Face* - A face presentation involves **complete extension** of the fetal head, with the occiput touching the fetal back. The face is the presenting part. - This is an abnormal variation of cephalic presentation and is incompatible with a flexed attitude. *Transverse* - A transverse lie means the fetus is positioned horizontally across the uterus, with the **shoulder being the presenting part**. - This presentation concerns the fetal lie, not the attitude of flexion or extension of the head relative to the body.

Q: What is the expected rate of cervical dilatation per hour during active labor in a primigravida?

1.0 cm. ***1.0 cm*** - Historically, the **minimum expected rate** of cervical dilatation during the active phase of labor for a primigravida has been accepted as **1.0 cm per hour**. - This rate is often used to define **protraction disorders** in labor, when dilatation falls below this threshold. *1.5 cm* - This rate is typically associated with the expected cervical dilatation in **multiparous women** during active labor, who often progress faster than primigravidae. - While some primigravidae may dilate at this rate, it is not the traditionally accepted **minimum expected rate** for the entire group. *1-7 cm per hour* - This range is too broad and does not represent a specific, expected minimum rate, but rather a **wide spectrum of possible dilatation speeds**. - While actual dilatation can vary significantly, the question asks for the **expected rate**, which implies a more defined minimum or average. *2 cm* - A dilatation rate of 2 cm per hour is considered **very rapid** and, while beneficial, is not the minimum expected or average rate for a primigravida in active labor. - Such a fast rate would indicate excellent labor progression, rather than the baseline expectation.

Q: What is Vagitus uterinus?

A cry of unborn baby from uterus. ***A cry of unborn baby from uterus*** - **Vagitus uterinus** refers to the **crying out** or **vocalization of a fetus** while still inside the uterus. - This rare phenomenon occurs when air somehow enters the uterus, allowing the fetal vocal cords to vibrate and produce a sound. *An infection of vagina* - This describes **vaginitis**, which is an inflammation of the vagina caused by infection (e.g., bacterial vaginosis, candidiasis) or other factors. - It does not involve any sound or crying from the fetus. *An infection of uterus* - This condition is known as **endometritis** (infection of the uterine lining) or **chorioamnionitis** (infection of the amniotic fluid and membranes during pregnancy). - These are inflammatory conditions of the uterus and do not involve fetal vocalization. *Infection of both vagina and uterus* - While possible to have both conditions concurrently, this description points towards a combination of **vaginitis** and **endometritis** or **chorioamnionitis**. - It has no relation to the fetal crying within the uterus.

Q: Which of the following is the shortest diameter of the fetal head?

Bitemporal diameter. ***Bitemporal diameter*** - The **bitemporal diameter** measures the distance between the two temporal bones and is typically **8.0 cm**, making it the **shortest diameter** of the fetal head. - This is a transverse measurement and is important in assessing cephalopelvic disproportion. *Biparietal diameter* - The **biparietal diameter** measures between the two parietal eminences and is typically about **9.5 cm**. - It is the most commonly measured diameter during ultrasound for assessing **fetal growth** and **gestational age**. - This is the presenting diameter in **well-flexed vertex presentation** (suboccipitobregmatic plane). *Suboccipitofrontal diameter* - The **suboccipitofrontal diameter** measures from the subocciput (below the occipital protuberance) to the center of the anterior fontanelle and is approximately **10.0 cm**. - This diameter presents in **deflexed vertex presentation** or **military attitude** where the head is in a neutral position (neither flexed nor extended). *Occipitofrontal diameter* - The **occipitofrontal diameter** measures from the occipital prominence to the glabella (root of the nose) and is about **11.5 cm**. - This is the presenting diameter in **persistent occipitoposterior position** with deflexion or in early stages before full flexion occurs.

Q: In the pelvic inlet, which is the shortest anteroposterior diameter?

Obstetric conjugate. ***Obstetric conjugate*** - The obstetric conjugate extends from the **posterior surface** of the **symphysis pubis** to the middle of the **sacral promontory**. - It is the **shortest anteroposterior diameter** of the pelvic inlet, measuring approximately **10.5-11 cm**. - This is the most clinically important measurement as it represents the actual available space for the fetal head during delivery. - It is shorter than the anatomical conjugate by approximately 1-1.5 cm (the thickness of the symphysis pubis). *Anatomical conjugate* - This diameter measures from the **superior border** of the **symphysis pubis** to the **sacral promontory**. - It measures approximately **11.5 cm**, making it slightly longer than the obstetric conjugate. - It doesn't account for the inward projection of the posterior surface of the symphysis pubis into the pelvic cavity. *Bispinous diameter* - The bispinous diameter is a **transverse diameter** (not anteroposterior), measuring the distance between the **ischial spines**. - This measurement belongs to the **midpelvis** (pelvic cavity), not the pelvic inlet. - Since the question asks specifically for an **anteroposterior diameter** of the pelvic inlet, this option is categorically incorrect. *True conjugate* - The true conjugate is synonymous with the **anatomical conjugate**, measuring from the **superior border** of the **symphysis pubis** to the **sacral promontory**. - It is not the shortest anteroposterior diameter; the obstetric conjugate is functionally shorter due to measurement from the posterior (rather than superior) surface of the symphysis pubis.

Question 1

What is considered an abnormal fetal scalp blood pH level that necessitates urgent intervention?

Accepted Answer

pH 7.15

Answer

pH 7.4

Answer

pH 7.3

Answer

pH 7.35

Question 2

True labor pain includes all of the following except.

Accepted Answer

Formation of the bag of waters

Answer

Painful uterine contraction

Answer

Cervical dilation

Answer

Show (mucus plug discharge)

Question 3

The definite sign of placental separation in stage 3 of parturition is

Accepted Answer

Lengthening of cord

Answer

Uterine contraction

Answer

Increase of BP

Answer

Descent of placenta into vagina

Question 4

A 25-year-old, 2nd gravida arrives in the labor room at full dilation. Which of the following practices is contraindicated at this stage of labor?

Accepted Answer

Liberal prophylactic use of ergometrine

Answer

Cord blood to be saved in 2 tubes - plain & EDTA

Answer

Early clamping of cord

Answer

Avoidance of manual removal of placenta

Question 5

When a fetus is in an attitude of flexion, which presentation is most likely?

Accepted Answer

Cephalic

Answer

Brow

Answer

Face

Answer

Transverse

Question 6

What is the expected rate of cervical dilatation per hour during active labor in a primigravida?

Accepted Answer

1.0 cm

Answer

1.5 cm

Answer

2 cm

Answer

1-7 cm per hour

Question 7

What is Vagitus uterinus?

Accepted Answer

A cry of unborn baby from uterus

Answer

An infection of vagina

Answer

An infection of uterus

Answer

Infection of both vagina and uterus

Question 8

Which of the following is the shortest diameter of the fetal head?

Accepted Answer

Bitemporal diameter

Answer

Biparietal diameter

Answer

Suboccipitofrontal diameter

Answer

Occipitofrontal diameter

Question 9

In the pelvic inlet, which is the shortest anteroposterior diameter?

Accepted Answer

Obstetric conjugate

Answer

Anatomical conjugate

Answer

Bispinous diameter

Answer

True conjugate

Question 10

Which of the following is the ideal method of removal of the placenta after delivery in routine delivery cases?

Accepted Answer

Spontaneous separation of placenta or by controlled cord traction

Answer

Manual removal of placenta after delivery of baby

Answer

Immediate & firm traction of cord after delivery of baby

Answer

Crede's method (Fundal pressure squeezing uterus to help placental separation and delivery)

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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