The World Health Organisation (WHO) definition of gestation should be used. This states: 'The period of gestation is measured from the first day of the last menstrual period (LMP). Gestational age is expressed in completed weeks; eg events occurring 280-286 days after the onset of the last menstrual period are considered to have occurred at 40 weeks gestation'.
Alternative methods of assessing gestation are:
| a. | Clinical assessment of uterine size |
| b. | Ultrasonic measurements, and/or |
| c. | Retrospective clinical assessment of the new born by a paediatrician |
This attribute is also known by these names:
| Context | Alias |
|---|---|
| plural | GESTATION LENGTHS (LABOUR ONSET) |