Which term refers to the time from conception to birth?

The term that refers to the time from conception to birth is prenatal. This period encompasses all stages of development of the fetus in the womb, beginning at conception and continuing until the moment of birth. It is crucial for the health of both the mother and the developing baby, as maternal health, nutrition, and environmental factors can significantly influence fetal development during this time.

The other terms provided refer to different stages or aspects of the human life cycle. Postnatal relates to the period after birth, focusing on the individual's development as they transition into the world outside the womb. Infancy designates a specific age range after birth, typically from birth to around one year old, highlighting a unique developmental stage characterized by rapid growth and significant changes. Gestational is often used to describe factors related to pregnancy but does not specifically indicate the time frame as clearly as prenatal does. Thus, prenatal is the most accurate term for defining the entire period from conception to birth.