Edited and Authored by Peter W. Callen, M.D.

An interactive site with Teaching Files (Fetal Congenital Anomalies, Gynecology, Artifacts and Pitfalls, Abstracts and Commentary of the Current Literature, Tables, Charts, Important Links and Bulletin Board

Online Teaching Files

Literature Search and Reviews

Bulletin Board

Reference Charts and Tables

Recommended Links

Demo this Site

Frequently Asked Questions


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 Online Teaching Files

Case of the month.
Sonogram of the fetal abdomen in the 2nd trimester.

Online Teaching Files
Membership to our site will provide you with access to the full collection of online teaching files.  Cases and their discussions can be viewed individually from a list sorted by diagnosis. Alternatively, one can view a selection of images as unknowns and click on any of the images to read a full discussion of the entity.

 Literature Search and Reviews

caducis_fly_md_clr.gifAbstracts and Commentary
The most significant articles and case reports relating to OB-Gyn ultrasound from ten journals are reviewed by the editor each week.  An "expanded abstract" and commentary are displayed. 
Click here to view the advantages of our service over MEDLINE.

Word(s) from Title:

Authors Last Name:


Date of Review:

Please use mo/dy/year format (e.g. 4/15/1999). All articles reviewed after this date will be returned.

 Bulletin Board


Help with Clinical Dilemmas/ Interesting Cases
Ultrasound Equipment
Help Wanted
Training Positions
Non-OB-GYN Ultrasound

Do not choose a category, if you would like to see all listings.

Bulletin Board
Post questions or comments regarding clinical dilemmas or interesting cases, ultrasound equipment, training positions, help wanted or general ultrasound questions. Replies are posted from the editor and/or other subscribers.

 Reference Charts and Tables

Gestational Sac Size
Gestational Sac Size, HCG & MA
Crown-rump Length
Biparietal Diameter
Head Circumference
Head Circumference (%)
Abdominal Circumference
Abdominal Circumference (%)
Femur Length
Teratogenic Cardiac Malformations
Association of Cardiac Disease with Anomalies
Fetal Long Bone Measurement
Amniotic Fluid Index

Nasal Bone Length

Ear Length

Choroid Plexus Cyst and Echogenic Intracardiac Focus - Recommendations

Cardiac Outflow Tract Abnl.
Thoracic Circumference
4 Chamber View and Malformations
AIUM Guidelines
Risk of Trisomy 18 with Choroid Plexus Cyst
Maternal Age Specific Odds of Fetal Down's Syndrome based on Non-structural Findings
Maternal Age-Specific Risk of Trisomy 18 with Choroid Plexus Cyst
Likelihood Ratios and Risk of Trisomy 21 based on Humeral Length (Bahado-Singh)
Ultrasound Criteria and Likelihood Ratios assigned for Detection of Trisomy 21 (Nyberg)
Likelihood Ratios and Risk of Trisomy 21 based on Nuchal Thickness (Bahado-Singh)

Middle Cerebral Artery - Peak Systolic Velocity (Kurmanavicius)

Middle Cerebral Artery - Peak Systolic Velocity (Mari)

Fetal Microcephaly - Biparietal Diameter (-SD)

 Recommended Links

MedPix - Medical Image Database
St. Georges Hospital, UK - Images
University of California, San Francisco, Department of Radiology
Dr. Woo's Ultrasound Home Page
The Fetus.net - Dr. Phillipe Jeanty

Syndrome Search - National Center for Biotechnology Information
N. Shinozuka, M.D.'s Web Page on Fetal Morphometric Data
UCSF-Fetal Treatment Center
Fetal Echocardiography Images / U Penn
Fetal Echocardiography Images (CD Format) / Gregory Devore, MD

 Demo this Site

Editor's Note
The purpose of this journal is to provide a continuously updated ultrasound teaching vehicle that combines the best features of textbooks, journals, CD ROM's and the WWW.  Click on the appropriate link to try our site!

Frequently Asked Questions
Click here to view.

Subcribe to OB-Gyn Ultrasound Online

Demo Teaching File: You may choose to view a selection of images without labels. You can use these as unknowns and click on any of the images and be taken to a full discussion of the entity.
Demo Search Form: Search for Dr. Callen's reviews on articles related to ultrasound in obstetrics and gynecology. In this demo an example of a search for pulmonary hypoplasia is shown. Just two of the articles normally returned in this search will be shown in the demo.
Demo Bulletin Board: Here you will be able to post questions or statements about OB-Gyn ultrasound. These will be viewed and often answered either by other subscribers or the editor himself.


Purchase Dr. Callen's Textbook

Click below to purchase.

Now in its 5th Edition, ULTRASONOGRAPHY IN OBSTETRICS AND GYNECOLOGY remains the definitive text in ultrasonography in obstetrics and gynecology. With more high-quality illustrations than ever, this 5th Edition provides an easy-to-read reference guide featuring numerous line drawings, extensive tables, color Doppler, and color medical illustrations.  1180 pp. 2400 ills (1,050 in full color). 8-1/2 x 11. Hard cover.  ISBN 0-7216-8132-8.



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Peter W. Callen, M.D.
Professor of Radiology, Obstetrics, Gynecology and Reproductive Science
University of California Medical Center, San Francisco, California