Perinatal & Prenatal Periods: Definitions & Key Stages

Perinatal and prenatal are terms used in medicine and biology to describe different periods of time related to pregnancy and childbirth.

Perinatal refers to the period of time around the time of birth, specifically from the 28th week of gestation (pregnancy) until the 7th day after birth. This period includes the last few weeks of pregnancy, the birth process, and the first week of life outside the womb.

Prenatal refers to the period of time before birth, from the moment of conception until birth. This period includes the embryonic stage (from conception to 8 weeks of gestation) and the fetal stage (from 8 weeks of gestation until birth).

Here's a summary of the key differences between perinatal and prenatal:

| Period | Duration | Key Features |

|---|---|---|

| Perinatal | 28th week of gestation to 7th day after birth | Includes the last few weeks of pregnancy, birth process, and first week of newborn life. |

| Prenatal | From conception until birth | Includes embryonic stage (conception to 8 weeks gestation) and fetal stage (8 weeks gestation to birth). |