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
34 shares
  • Facebook18
  • Twitter
PGMEE, MRCS, USMLE, MBBS, MD/MS AnatomyObGynReproductive system

Post navigation

Previous post
Next post

Related Posts

Ophthalmology Spot Diagnosis: Hyphema

Jan 10, 2014May 23, 2014

Definition: Accumulation of blood in the Anterior Chamber (AC). Causes: a. Post-traumatic: Trauma or surgery b. Spontaneous: Neovascularization Ocular neoplasms Vascular and clotting anomalies (leukemia, hemophilia, aspirin) Grading for Traumatic Hyphema: 0 : No layered blood, circulating RBCs only (Microhyphema) 1: Layered blood filling < 1/3 of AC 2: Layered…

Read More
PGMEE, MRCS, USMLE, MBBS, MD/MS pediatrician-patient

Pediatric History Taking – Structured format and Guide

May 19, 2019Oct 27, 2020

Identification (ID): Name Age/Date of Birth Sex Informant ( Reliability) Parent’s name, age, address, education, religion Chief Complaints (CC): Symptoms X Duration in Chronological order History of Presenting Illness (HPI): Symptoms: Location, quality, quantity, aggravating and alleviating factors Time course: Onset, duration, frequency, change over time Rx/Intervention: Medications, medical help…

Read More
PGMEE, MRCS, USMLE, MBBS, MD/MS antidepressant side effects

Antidepressants : Mnemonics

Oct 28, 2024Oct 28, 2024

Classification and Mechanism of Action Acronyms: Mnemonic: TRIM 3N 3S Class Mechanism Drugs Side effects TCA Blocks reuptake of 5-HT, NA & other receptors (H1, ACh, α1, Voltage sensitive Na+ channel) Mnemonic: ANTI-DeP-C1. Amitryptiline, Amoxapine2. Nortryptiline3. Trimipramine4. Imipramine5. Doxepin, Desipramine, Dothiepin6. Protryptiline7. Clomipramine M1 blockade: Muscarinic anticholinergic side-effects α1 blockade:…

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 Nov 12]. 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 feed: Ask Epomedicine 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