Reference notes are now updated in redmine, please check there for latest information. https://redmine.uscdcb.com/projects/cdcb-customer-service/wiki/REFERENCES#Ref24
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Old : 2015-09-08 to 2018-01-01
Reference 24. -- Multiple-birth codes:
| 1 | = | Single |
| 2 | = | Multiple birth (not from embryo transfer) |
| 3 | = | Birth from embryo transfer |
| 4 | = | Split embryo |
| 5 | = | Clone from nuclear transfer |
| 6 | = | Embryo pedigree (implantation date stored as birth date) |