No ka hanaʻana o petal Fetal Doppler , he mau mea'ē aʻe nā mea āpau e pili ana i ia mea, a he aha kā mākou e hana nei e hoʻonui i nā mea kūʻai aku o kēlā me kēia mea kūʻai aku ka a me nā leʻaleʻa o kā mākou mea kūʻai aku ma nā'āina he nui. Mecacmed Pecket Pettel Doppler loaʻa i ka hoʻolālāʻana a me ka hana hoʻoikaika a me ka hana hoʻokūkū, no kaʻike hou aku i e kelepona iā mākou.