Skip to content
Epomedicine

Mnemonics, Simplified Concepts & Thoughts

Epomedicine

Mnemonics, Simplified Concepts & Thoughts

fetal skull transverse

Fetal Skull Dimensions : Mnemonic

Epomedicine, Jul 27, 2018

Anteroposterior Diameters

Mnemonic:

  1. Larger the alphabets, larger the diameter (V>F>B)
  2. Diameters with “sub” prefix are smaller than counterpart without it.

fetal skull AP

  1. mento-Vertical: 14 cm
    • SUB-mento-Vertical: 11.5 cm
  2. occipito-Frontal: 11.5 cm
    • SUB-occipito-Frontal: 10.5 cm
  3. sub-occipito-Bregmatic: 9.5 cm
  4. sub-mento-Bregmatic: 9.5 cm

Transverse Diameters

fetal skull transverse

Mnemonic: MTP (Medical Termination of Pregnancy) in increasing order.

  1. bi-Mastoid: 7.5 cm
  2. bi-Temporal: 8 cm
  3. bi-Parietal: 9.5 cm
33 shares
  • Facebook18
  • Twitter
PGMEE, MRCS, USMLE, MBBS, MD/MS AnatomyObGynReproductive system

Post navigation

Previous post
Next post

Related Posts

PGMEE, MRCS, USMLE, MBBS, MD/MS

Idiopathic Scoliosis Made Easy

Jul 30, 2022Oct 28, 2022

Definition Cobb’s angle >10° Diagnosis of exclusion: Congenital scoliosis and Neuromuscular scoliosis ruled out Types: Early onset (<10 years): Infantile: 0-3 years Juvenile: 4-10 years Late onset (>10 years) Adolescent: 10-18 years Adult: >18 years Indications for MRI in general Mnemonic: Left JAPAN Left thoracic curves Juvenile onset (<10 years)…

Read More
PGMEE, MRCS, USMLE, MBBS, MD/MS Leukocyte adhesion deficiency types

Leukocyte Adhesion Cascade and Defect : Simplified

Jun 23, 2016Nov 22, 2022

Capture or Tethering Increased vascular permeability and vasodilation are mediated by inflammatory mediators like histamine released by inflammatory cells in response to PAMPs expressed by pathogens. Hemoconcentration (owing to increased vascular permeability) and decreased velocity of blood flow (owing to vasodilation) leads to peripheral pooling of the leukocytes (i.e. towards…

Read More
PGMEE, MRCS, USMLE, MBBS, MD/MS

Lateral and Medial Pectoral Nerve : Mnemonic

Dec 29, 2024Dec 29, 2024

Mnemonics a. Lateral is Less and Medial is More. b. Major receives 2 innervations and Minor receives 1 innervation. Hence, Lateral pectoral nerve passes through and supplies Pectoralis major. Medial pectoral nerve passes through and supplies Pectoralis major and minor. The lateral pectoral nerve and the medial pectoral nerve form…

Read More

Comments (6)

  1. Tajmina parbin says:
    Sep 7, 2019 at 9:10 am

    Very useful information

    Reply
  2. samikshya lama says:
    Jan 21, 2020 at 3:52 pm

    why is submentovertical diameter less than mentovertical

    Reply
    1. Taha says:
      Nov 27, 2020 at 3:30 pm

      Because it is measured from a closer point to the back of the head.

      Reply
    2. Dr Ankit says:
      Mar 20, 2021 at 2:11 am

      Bcz it is made by God n we can not change it

      Reply
    3. lakshmi says:
      Jun 11, 2023 at 11:05 pm

      submento is from the side of the chin to vertex.so that is why it is smaller than mento vertical.

      Reply
  3. Dushyant says:
    Nov 24, 2021 at 7:28 am

    Pic is informative, could have been more clear graphically

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Epomedicine. Fetal Skull Dimensions : Mnemonic [Internet]. Epomedicine; 2018 Jul 27 [cited 2026 Jun 23]. Available from: https://epomedicine.com/medical-students/fetal-skull-dimensions-mnemonic/.

Pre-clinical (Basic Sciences)

Anatomy

Biochemistry

Community medicine (PSM)

Embryology

Microbiology

Pathology

Pharmacology

Physiology

Clinical Sciences

Anesthesia

Dermatology

Emergency medicine

Forensic

Internal medicine

Gynecology & Obstetrics

Oncology

Ophthalmology

Orthopedics

Otorhinolaryngology (ENT)

Pediatrics

Psychiatry

Radiology

Surgery

RSS Ask Epomedicine

  • What to study for Clinical examination in Orthopedics?
  • What is the mechanism of AVNRT?

Epomedicine weekly

  • About Epomedicine
  • Contact Us
  • Author Guidelines
  • Submit Article
  • Editorial Board
  • USMLE
  • MRCS
  • Thesis
©2026 Epomedicine | WordPress Theme by SuperbThemes