For the study group, whenever woman felt any abnormality of her baby, she could contact the long-distance electronic fetal heart rate (FHR) monitoring center in hospital by telephone immediately.

• 使监护的时机更准确和有效，使用该系统孕妇的监护时机为孕妇本人感到异常时，如前所述，在这个时机，最易发现胎心率异常。