Gestational Weeks Assessment

**Semantic type:** Health Care Activity

**Definition:** Gestational age (written with both weeks and days, e.g. 39 weeks and 0 days) is calculated using the best obstetrical estimated due date (EDD) based on the following formula: Gestational Age = (280 - (EDD - Reference Date))/ 7. Note: Reference Date is the date on which you are trying to determine gestational age. (reVITALize)

**Synonyms:** - Gestational Age - Gestational Weeks