At 32+ weeks gestation, what is the criteria for an acceleration in the FHR?

At 32+ weeks gestation, an acceleration in fetal heart rate (FHR) is defined as an increase in the heart rate of at least 15 beats per minute above the baseline, lasting for at least 15 seconds. This definition reflects the standard criteria used in fetal monitoring to assess the well-being of the fetus.

Using the terminology of "15 by 15," the first number indicates the required increase in heart rate (15 beats per minute), while the second number indicates the duration for which this increase must be sustained (15 seconds). Notably, this threshold is indicative of a healthy fetal response, suggesting adequate oxygenation and a well-functioning autonomic nervous system.

In contrast, the other choices present incorrect values for this criteria, as they specify greater increments or longer durations that do not apply at this stage of gestation. The reliability of the "15 by 15" standard is well-documented in obstetric practice, making it the correct choice for determining FHR accelerations at this gestational age.