Monozygotic twins originate from a single fertilized ovum dividing into two embryos, while dizygotic twins result from ovulation of two eggs during a single menstrual cycle.
Additional Test Information
EDTA Whole Blood (lavender top) or Buccal Swabs
5 ml on each twin or 4-8 Buccal Swabs per requisition
PCR and Fragment Analysis
Performed 5 days per week (Monday through Friday)