Final answer:
The age of an unborn child can be measured in different ways: gestational age, fetal age (also known as conceptional age), and developmental age.
Step-by-step explanation:
The age of an unborn child can be measured in a few different ways.
- Gestational age: This is measured from the first day of the woman's last menstrual period and is commonly used by doctors and obstetricians.
- Fetal age: This is measured from the time of fertilization and is the actual age of the fetus.
- Conceptional age: This is also measured from the time of fertilization and is another term for fetal age.
- Developmental age: This refers to the stage of development of the fetus, such as the pre-embryonic stage, embryonic stage, or fetal stage.