多普勒胎心仪可以直接听到心跳,商店里有卖的,几十块美元一个。医院里更是常规设备。三个月听到胎心是没有问题的。
多普勒胎心仪可以直接听到心跳,商店里有卖的,几十块美元一个。医院里更是常规设备。三个月听到胎心是没有问题的。
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