The nursing instructor is preparing a group of nursing students for their clinical phase and is questioning them on the various assessment skills they will need. The instructor determines the session is successful when the students correctly choose which time interval to assess the fetal heart rate of clients who are in the active phase of labor?

once every 30 minutes

Explanation:

According to best medical practice it is recommended that assessing the fetal heart rate should done at least once every 30 minutes during the active phase of  labour.

It is important to note that If the fetal heart rate is less than 120 or more than 160 beats per minute for around 10 minutes then there is a problem (could be a case of fetal distress).