Labor and Delivery Practice Questions

Q: Most common breech presentation in primigravida is?

Frank breech presentation. ***Frank breech presentation*** - This is the most common type of breech presentation, accounting for **65-70% of all breech presentations**, especially in **primigravida**. - The baby's **hips are flexed and knees are extended**, with the feet near the head. - The extended legs splint the fetal body and contribute to a more stable position within the uterus. *Complete breech presentation* - In a **complete breech**, the baby's hips and knees are both flexed, with the buttocks presenting first and the feet near the buttocks. - Accounts for approximately **5-10% of breech presentations**. - While common, it is significantly less frequent than frank breech, particularly in primigravidas. *Footling breech presentation* - In a **footling breech**, one or both feet present first through the cervix. - Accounts for approximately **10-30% of breech presentations**. - Associated with higher risks including premature rupture of membranes, umbilical cord prolapse, and is less stable during delivery. *Incomplete breech presentation* - This is a general term that includes **footling and kneeling breech** presentations, where the presentation is neither frank nor complete. - It's an encompassing category rather than a specific single presentation type. - Less common than frank breech as the most frequent single type in primigravidas.

Q: Mediolateral episiotomy is preferred because?

Reduces damage to anal sphincter and anal canal. ***Reduces damage to anal sphincter and anal canal*** - The **mediolateral episiotomy** is cut at an angle away from the midline, significantly reducing the risk of extending into the **anal sphincter** and **rectum**. - This angulation helps to avoid severe perineal tears, protecting against **fecal incontinence** and other long-term complications. *Less blood loss* - **Mediolateral episiotomies** often result in more blood loss compared to midline episiotomies due to cutting across more muscle and blood vessels. - The angled incision involves a larger area of vascular tissue, increasing the potential for bleeding. *Easy to suture* - **Mediolateral episiotomies** are generally more complex and difficult to repair than midline episiotomies due to the irregular nature of the angled incision. - Achieving proper anatomical alignment and hemostasis can be challenging. *Easy technique* - While a commonplace procedure, the **mediolateral episiotomy** requires precise angulation and depth to ensure effective tissue release and avoid critical structures. - **Midline episiotomies** are technically simpler to perform due to their straightforward, sagittal incision, though they carry higher risks of severe tears.

Q: What is the risk of scar rupture in the lower segment of the uterus in patients with a previous cesarean section?

0.5 - 1.5%. ***0.5 - 1.5%*** - The risk of **uterine scar rupture** in a **lower segment Cesarean section** (LSCS) is generally low, ranging from 0.5% to 1.5% during a Trial of Labor After Cesarean (TOLAC). - This low risk is why **Vaginal Birth After Cesarean (VBAC)** is often considered a safe option for selected patients. *15 - 25%* - This percentage is significantly higher than the actual risk for a **lower segment Cesarean scar rupture**. Risks this high would generally lead to reconsideration of VBAC as a safe option. - Such a high risk is usually associated with a **classical (vertical) incision** on the uterus or multiple previous Cesarean sections. *2.5 - 3.5%* - This range is higher than the typical risk for a single **lower segment Cesarean scar rupture**. - While still relatively low, it might be observed in specific populations or with certain risk factors like a short inter-delivery interval or a single-layer uterine closure. *3.5 - 4.5%* - This risk is considerably elevated compared to the established risk for a **lower segment Cesarean scar rupture** and would generally lead to a more cautious approach to TOLAC. - This range can be associated with specific risk factors for scar dehiscence or rupture such as a history of multiple previous Cesarean sections or certain uterine anomalies.

Q: Which is the engaging diameter in occipitoposterior presentation?

Suboccipitofrontal. ***Suboccipitofrontal*** - In an occipitoposterior presentation, the fetal head is usually deflexed, causing the **suboccipitofrontal diameter** (approximately 10 cm) to be the engaging diameter. - This diameter extends from the junction of the occiput and the neck to the anterior part of the forehead (glabella). *Mentovertical* - The **mentovertical diameter** is the engaging diameter in a brow presentation, which is typically around 13.5 cm and usually makes vaginal birth impossible. - This diameter extends from the chin to the very top of the head (vertex). *Submentovertical* - The **submentovertical diameter** is the engaging diameter in a face presentation, measuring about 11.5 cm. - This diameter extends from below the chin to the vertex of the head. *Bitrochanteric* - The **bitrochanteric diameter** refers to the width between the fetal **trochanters** (hips) and is relevant for breech presentations, but not for cephalic presentations. - It is typically around 10 cm and is not involved in head engagement.

Q: Which type of pelvis is most accommodating for the occipitoposterior position during labor?

Anthropoid. ***Anthropoid*** - The **anthropoid pelvis** is characterized by a long anteroposterior diameter and a narrow transverse diameter, which allows the fetal head in an **occipitoposterior (OP) position** to accommodate more easily. - Its oval shape facilitates a direct anterior-posterior delivery, reducing the need for extensive rotation when the occiput is posterior. *Android pelvis* - The **android pelvis** is heart-shaped with a narrow pubic arch and reduced diameters, making it unfavorable for *any* fetal presentation, especially OP. - This pelvic type is associated with a higher incidence of **arrest of labor** and requires more interventions during delivery. *Gynaecoid* - The **gynaecoid pelvis** is considered the classic female pelvis, with a rounded inlet and good proportions for vaginal delivery in an **occipitoanterior (OA) position**. - While generally favorable, its broader transverse diameter makes accommodation of an OP position less optimal compared to the anthropoid pelvis. *Platypelloid* - The **platypelloid pelvis** has a flattened shape with a short anteroposterior diameter and a wide transverse diameter. - This shape is highly unfavorable for vaginal delivery, as it obstructs engagement and descent of the fetal head in both OA and OP positions, leading to complications.

Q: What is the most common position of engagement in vertex presentation?

Left Occiput Anterior (LOA). ***Left Occiput Anterior (LOA)*** - This is the **most common** fetal position for engagement, as the fetal head's **occiput** aligns with the maternal pelvis's **left anterior quadrant**. - The **long axis** of the fetal head is generally aligned with the **oblique diameter** of the maternal pelvis, facilitating descent. *Right Occiput Anterior (ROA)* - While an anterior position, **LOA** is more common due to the typical orientation of the **uterus and fetal spine**. - The fetal occiput is in the **right anterior quadrant** of the maternal pelvis. *Right Occiput Posterior (ROP)* - This is a **malposition** that can lead to **prolonged labor** and increased pain due to direct pressure on the sacrum. - The fetal occiput is in the **right posterior quadrant** of the maternal pelvis. *Left Occiput Posterior (LOP)* - Similar to ROP, this is also a **malposition** that may require significant **rotation** for successful vaginal delivery. - The fetal occiput is in the **left posterior quadrant** of the maternal pelvis.

Q: What is the presenting diameter of a fully flexed head?

Suboccipito-bregmatic diameter. ***Suboccipito-bregmatic diameter*** - This diameter measures from the **nape of the neck** (**suboccipital region**) to the **anterior fontanelle** (**bregma**), which is the smallest presenting diameter of the fetal head when it is in **full flexion**. - A fully flexed head presents the smallest and most favorable diameter for vaginal birth, allowing for optimal passage through the birth canal. *Suboccipito-frontal diameter* - This diameter is measured from the **nape of the neck to the center of the forehead**, indicating a less flexed head than the suboccipito-bregmatic diameter. - While it represents some flexion, it is not the ideal presenting diameter for a fully flexed head and is larger than the suboccipito-bregmatic diameter. *Occipito-frontal diameter* - This diameter is measured from the **occipital protuberance to the forehead**, representing a **deflexed** or **partially flexed** head. - This presentation is less favorable for vaginal delivery as it is a larger diameter than either the suboccipito-bregmatic or suboccipito-frontal diameters. *Biparietal diameter* - This diameter measures the **widest transverse diameter of the fetal head**, between the two parietal eminences. - While clinically important for assessing head size and growth, it is **not a presenting longitudinal diameter** that describes the leading part of the fetal head during engagement and descent.

Question 1

Most common breech presentation in primigravida is?

Accepted Answer

Frank breech presentation

Answer

Footling breech presentation

Answer

Incomplete breech presentation

Answer

Complete breech presentation

Question 2

Mediolateral episiotomy is preferred because?

Accepted Answer

Reduces damage to anal sphincter and anal canal

Answer

Less blood loss

Answer

Easy to suture

Answer

Easy technique

Question 3

What is the risk of scar rupture in the lower segment of the uterus in patients with a previous cesarean section?

Accepted Answer

0.5 - 1.5%

Answer

15 - 25%

Answer

2.5 - 3.5%

Answer

3.5 - 4.5%

Question 4

Which is the engaging diameter in occipitoposterior presentation?

Accepted Answer

Suboccipitofrontal

Answer

Mento vertical

Answer

Submentovertical

Answer

Bitrochanteric

Question 5

Which type of pelvis is most accommodating for the occipitoposterior position during labor?

Accepted Answer

Anthropoid

Answer

Android

Answer

Gynaecoid

Answer

Platypelloid

Question 6

A multigravida patient with a 4 kg fetus has been in labor for 15 hours, with cervical dilation at 5 cm for the last 8 hours. What is the most appropriate management for this patient?

Accepted Answer

Cesarean section

Answer

Observe and monitor the patient

Answer

Perform amniotomy if indicated

Answer

Administer oxytocin for augmentation of labor

Question 7

What is the most common position of engagement in vertex presentation?

Accepted Answer

Left Occiput Anterior (LOA)

Answer

Right Occiput Anterior (ROA)

Answer

Right Occiput Posterior (ROP)

Answer

Left Occiput Posterior (LOP)

Question 8

Which of the following is NOT a contraindication for induction of labour?

Accepted Answer

Hypertensive disease of pregnancy

Answer

Heart disease of pregnancy

Answer

Pelvic tumor

Answer

Vasa previa

Question 9

A primigravida presents to the labor room at 40 weeks of gestation with lower abdominal pain.    She has been in labor for 3 hours. Which of the following will determine if she is in active    labor?

Accepted Answer

Cervical dilatation of 6 cm or more with regular contractions

Answer

Fetal head 5/5 palpable on abdominal examination

Answer

Two contractions lasting for 10 seconds in 10 minutes

Answer

Rupture of membranes

Question 10

What is the presenting diameter of a fully flexed head?

Accepted Answer

Suboccipito-bregmatic diameter

Answer

Suboccipito-frontal diameter

Answer

Occipito-frontal diameter

Answer

Biparietal diameter

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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