What is the age of viability, and during what weeks does a fetus reach this age?

The age of viability (fetal viability) is the age at which a fetus can live outside of the womb. The age of viability is around 24 weeks but fetuses as early as 22 weeks can survive with  intense medical intervention.

Fetal viability is the baby's ability to survive outside the womb. Fetuses usually reach this capacity at 24 weeks of age.

Explanation:

Fetal viability is the baby's ability to survive outside the womb. Fetuses usually reach this capacity at 24 weeks of age.

When the fight to legalize abortion began, advocates of this practice also used the term “viability” to describe the point at which an embryo becomes a human being, thus claiming that the fetus is not considered as such.

Leaving aside the controversy that contains the proper meaning of the word, doctors use the term “fetal viability” to describe the moment when vital organs, such as the kidneys, lungs or heart, are sufficiently well formed to function with or without medical care. This event usually occurs around 24 weeks of pregnancy, when the fetus could be born. Otherwise, the birth would be too premature, or impracticable, with a low or very low probability of success.