- Gestation describes the time between conception and birth — or how far along in your pregnancy you are.
- Gestational age is measured in weeks, from the first day of your last period to the current date.
- If you underwent in vitro fertilization, gestational age can be calculated from the date of embryo transfer and the age of your embryo.
- Gestational age can help your doctor provide the best prenatal care for you and your baby and monitor your baby's development.
- There’s a difference between gestational age and fetal age. Gestational age is how far along you are, while fetal age refers to the age of the fetus — usually two weeks apart.