blastocardia

例句：

1. 1. The fetal heart rate isa crucial indicator of the baby'shealth.
   胎儿心率是衡量婴儿健康的关键指标。
2. 2.During labor, doctors monitor the fetalheart to ensure the baby's well-being.
   在分娩过程中，医生监测胎儿心率以确保婴儿的健康。
3. 3. Researchers are studying theeffects of drugs on the blastocardia during pregnancy.
   研究人员正在研究药物对孕期胎心的影响。