North American Registry of Midwives (NARM) Practice Exam

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Which milestone in fetal development is characterized by the ability to sustain life outside the womb?

The first trimester
The age of viability
The second trimester
The third trimester

The correct answer is: The age of viability

The age of viability refers to the stage in fetal development when the fetus is capable of surviving outside the womb. This milestone typically occurs around 24 weeks of gestation, although this can vary somewhat based on individual circumstances and advances in neonatal care. At this point, the lungs, brain, and other vital systems have developed sufficiently to support life, which is why this term is specifically associated with the capacity for independent existence outside the uterus. Understanding the age of viability is essential for midwives and healthcare providers, as it informs decisions about interventions and care for preterm infants, as well as counseling for expectant parents regarding potential outcomes associated with early delivery. This stage emphasizes the importance of continued fetal development during the later trimesters, as well as the significant advancements that can be made in neonatal medicine to support early arrivals.