What statement by the client at 32 weeks' gestation indicates an understanding of when to call the physician?

The statement indicating an understanding of when to call the physician is the one regarding bleeding, even in the absence of pain. During pregnancy, particularly in the third trimester, any instance of bleeding is considered significant and warrants immediate medical attention. This is crucial as it may point to potential complications such as placental abruption, placenta previa, or other serious issues that can affect both the mother and the fetus. Recognizing this symptom and having a proactive approach to seek medical advice demonstrates awareness of the warning signs that could signify serious health concerns.

Other statements reflect various concerns, but they do not indicate the same level of urgency. For instance, leg cramps at night can be a common and usually benign issue during pregnancy; it's often related to changes in blood flow and can typically be managed with simple interventions like stretching. Increased fetal movement, while noteworthy, does not always indicate a problem and should be evaluated in conjunction with overall patterns of activity. A headache that resolves on its own may be common in pregnancy, but a pounding headache that persists could require evaluation—however, without more context indicating severity or duration, it's not as critical as the indication of bleeding.