Free OBGYN Board Review Sample Questions
TrueLearn is a trusted resource for so many OB/GYN residents. We understand that it’s all about the content. That’s why we have high-yield ABOG and CREOG practice questions written and screened by high-performing physician authors that are updated on a regular basis to ensure our SmartBanks stay up-to-date with exam blueprint changes. See what we mean with the below free OB/GYN board review questions.
Your First Free OB/GYN Review Question
Which of the following nerves is responsible for sensory innervations to the perineum?
- A) Anococcygeal
- B) Femoral
- C) Lateral femoral cutaneous
- D) Perineal
- E) Pudendal
The Answer and Explanation
Did you get it right? The correct answer is: E
More than 60 nerves innervate the female pelvis, providing both motor and sensory effects. The pudendal nerve is responsible for sensory innervation to the perineum.
As the fetus descends in the late first stage or second stage of labor, distention of the vagina, pelvic floor, and perineum elicit stimuli through the pudendal nerve and the anterior primary divisions of sacral nerves S2 through S4. This pain is predominantly somatic and is better localized than pain that occurs earlier in labor. The pudendal block is therefore useful primarily in the second stage of labor after delivery to facilitate repair of perineal lacerations. The block involves injecting local anesthetic transvaginally into the vicinity of the pudendal nerve below the ischial spines.
- Answer A: The anococcygeal nerve provides sensory innervation to the skin overlying the coccyx.
- Answer B: The femoral nerve provides sensory innervation to the skin overlying the anterior thigh.
- Answer C: The lateral femoral cutaneous nerve provides sensory innervation to the skin overlying the lateral thigh.
- Answer D: The perineal nerve provides sensory innervation to the skin overlying the posterior aspect of the labium majus.
The pudendal nerve provides both sensory and motor innervation to the perineum.
For more information, see:
- ACOG Practice Bulletin 209: Obstetric Analgesia and Anesthesia. 2020.
- Te Linde’s Operative Gynecology, 12th ed. Chapter 1: Surgical Anatomy of the Female Pelvis.
- Anderson D. Pudendal nerve block for vaginal birth. J Midwifery Womens Health. 2014 Nov-Dec;59(6):651-659.
More Free OBGYN Sample Questions
Fill out the brief form below to get access to additional free OBGYN practice questions. And when you’re ready, check out our question bank subscriptions.