What Is Pregnancy Viability

What is Pregnancy Viability?

Pregnancy viability is the point at which a pregnancy will likely be able to continue on its own without any medical intervention. It usually occurs when the fetus has developed enough to survive outside of the uterus, if the circumstances are right. Before this point, a pregnancy is considered non-viable and the chances of it continuing to full-term and resulting in a live birth are slim.

What Factors Affect Pregnancy Viability?

The main factors that affect pregnancy viability are the age of the mother, the size and health of the fetus, and the health of the mother.

    Age of the Mother:

  • The chance of having a successful viable pregnancy decreases with age, especially for mothers over 40. This is due to a decrease in egg health and low fertility rates.
  • Size and Health of the Fetus:

  • The size and health of the fetus has a big effect on its ability to survive outside of the uterus. Preterm babies, especially those born before 24 weeks, are at an increased risk of health complications due to their undeveloped organs.
  • Health of the Mother:

  • The health of the mother is also an important factor in determining pregnancy viability. If the mother has any chronic health conditions, such as diabetes or high blood pressure, this can affect the health of the fetus and the likelihood of a successful pregnancy.

Pregnancy Viability Tests

There are several tests that can be used during pregnancy to determine its viability. These tests include ultrasound examinations and blood tests. Ultrasounds use sound waves to form images of the fetus, allowing healthcare professionals to assess the growth and development of the fetus. Blood tests measure hormone levels to determine how far along the pregnancy is and the health of the fetus.

Pakistan Total Fertility Rate

When is Pregnancy Considered Viable?

Pregnancy is usually considered viable after 24 weeks of gestation, although some pregnancies can be viable outside of this range. The American Congress of Obstetricians and Gynecologists (ACOG) has recommended that any pregnancy at or after 23 weeks be considered viable. However, a baby born before this time is still at risk of health complications due to the lack of development of its organs.


While every pregnancy is different, understanding the factors that affect pregnancy viability and the tests available can help healthcare professionals and expecting parents better prepare for the journey ahead.

Send this to a friend