During weeks 17-20, quickening occurs, which is when the
a.
fetus’ sense of hearing is developing at a rapid pace
b.
mother can hear the fetus’ heartbeat with headphones
c.
fetus’ heart rate increases to 150 beats per minute
d.
mother is able to feel the fetus move inside her womb

During weeks 17-20, quickening occurs, which is when the mother is able to feel the fetus move inside her womb. Correct D

The term quickening denotes the first fetal movements . However sometimes it is difficult, especially for first-time mums to determine whether this feeling is gas or your baby’s movements.

i think its pulmonary not sure tho