Final answer:
When a monitor shows late decels, the first action is to change the mother's position. Calling the doctor is important if the late decels persist or worsen after attempting to change the position.
Step-by-step explanation:
When a monitor shows late decels, the first action to take is to change the mother's position. Late decels are a type of abnormal heart rate pattern in a fetus during labor. They typically indicate decreased blood flow and oxygen to the fetus. By changing the mother's position, for example, from lying on her back to an alternative position, it helps improve blood flow and oxygenation to the fetus, which can help resolve the late decels. Administering oxygen or changing the fetal monitor may be necessary after attempting to change the mother's position, but it is not the first step. If the late decels persist or worsen after changing the mother's position, it is important to seek medical assistance and call the doctor for further evaluation and guidance.