[KongchangAI]
Unverified85% confidenceSolutionTime unknown

家用胎心仪的正确使用流程:孕16周后使用→平躺放松→耻骨联合上方2-3指处涂足耦合剂→缓慢移动探头搜索→找到清晰节律后固定→连续听1分钟以上确认区间;测不到时不要慌张,可换时段(胎动后)再试

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