Heart Beat Baby Laju

Hye semua. Saya hamil 21 Minggu. Ade beli fetal Doppler Dkt Shopper utk pantau nadi Bayi. Selalu dpt 154-170..normal ke. Sbb sy tgk rate heartbeat normal utk 2nd trimestr 140bpm. And spnjg hamil 110-160..saya knfius.