these findings suggest that fetal cardiac beta-adrenergic , muscarine-cholinergic receptors and vascular postsynaptic alpha-adrenergic receptor may be sensitive enough to respond to sympathomimetic and sympatholytic drugs , and the fetal cardiac sympathetic innervation between the adrenergic nerve terminal and synapse effector cells may be developed on day 18-19 of gestation .
C0015935
fetal
C0015965
fetal