A nurse is reviewing statistics related to pregnancy duration with a group of prenursing students. The class learns that the length of pregnancy from conception to birth is approximately normally distributed with a mean of 272 days and a standard deviation of 8 days. Which explanation best describes why understanding this distribution is clinically useful when estimating a client's due date?
- It shows that most pregnancies fall within a predictable range around the mean, helping clinicians identify pregnancies that may be preterm or post-term.
- It confirms that every pregnancy lasts exactly 272 days, so due dates are always precise.
- It indicates that pregnancy length is random and cannot be used to predict clinical outcomes.
- It means that pregnancies lasting longer than 280 days are always considered abnormal and require immediate intervention.