NCIt related terms : Estimated Date of Confinement; Estimated Date of Delivery; EDLVRDTC; Estimated Due Date; EDD;
NCIt definition : The best estimated due date is determined by: last menstrual period (LMP) if confirmed
by early ultrasound or no ultrasound performed, or early ultrasound if no known LMP
or the ultrasound is not consistent with LMP, or known date of fertilization (e.g.
Assisted Reproductive Technology (ART), Intrauterine Insemination (IUI)). Notes: 1.
Ultrasound margin of error and early to be defined by SMFM/ACOG/NICHD workshop. 2.
Pregnancy should not be re-dated by a later ultrasound after a best obstetrical estimate
of EDD has been established. (adapted from reVITALize);
Alternative definition : CDISC: An approximate calculation of the delivery date.; NICHD: The best estimated due date is determined by: last menstrual period (LMP) if
confirmed by early ultrasound or no ultrasound performed, or early ultrasound if no
known LMP or the ultrasound is not consistent with LMP, or known date of fertilization
(e.g. Assisted Reproductive Technology (ART), Intrauterine Insemination (IUI)).;
NCIt note : NICHD Perinatal Note: 1. Ultrasound margin of error and early to be defined by SMFM/ACOG/NICHD
workshop. 2. Pregnancy should not be re-dated by a later ultrasound after a best obstetrical
estimate of EDD has been established. (adapted from reVITALize);