Please note: This program is eligible for 0.75 continuing education credits for Physicians, California Nurse and General Participation credits and 0.90 credits for California Lab Personnel. FLP credits are not eligible due to compliance constraints with CE Broker. For further clarification please contact

AABB reserves the right to make updates to this program.

Recorded: June 6, 2017 - On-Demand Available

Master Program Number: 17EL-195 (see program format numbers below under Registration)

Educational Track: Technical/Clinical
Topic: Transfusion Medicine - Relationship Testing
Intended Audience: Physicians, Scientists, Technologists
Teaching Level: Intermediate

Director: Robert Wenk, MD, Chairman, AABB Relationship Testing Accreditation Program Unit, Baltimore, MD
Moderator: Kelly Meyer, Webcast Specialist, AABB, Bethesda, MD
Speaker: Harmeet Kaur, PhD, Laboratory Quality Assurance Manager, Laboratory Director, Parentage & ID Unit, Cuyahoga County Regional Forensic Science laboratory Office of the Cuyahoga County Medical Examiner, Cleveland, OH

Learning Objectives

After participating in this educational activity, participants should be able to:

  • Identify the kinds of twins, their frequencies, embryogenesis and genetic characteristics.
  • Describe the embryology that produces twins, placental membrane absences and fetal anomalies of twins.
  • Discuss the development of chimera.
  • Recognize how phenotype discordance can occur by environmental, genetic and epigenetic means.
  • Distinguish MZ and DZ twins using STR tests.

Program Description

Fascination with human twins has made them important subjects in religions, mythology, literature, genetics and medicine.  The genesis of various types of twins has been updated recently.  RT labs may be called upon to distinguish between two common types (MZ and DZ) for clinical or genetic reasons and for curiosity. This program addresses the subjects of twin genesis, classification, frequency, anomalies, phenotype discordance and the distinction of MZ and DZ twins by RT laboratories.  


   Program # Registration Fees
Single Viewer: On-Demand Register17EL-4036-195$66/$53 (List Price/Member Discount)
Group Viewing: On-Demand Register17EL-8036-195$260/$227 (List Price/Member Discount)

Groups have the opportunity to view an On-Demand eCast in more than one location for an additional $100 per location.