The short-term (0–48 h) effects of maternal betamethasone administration on been described to transiently reduce fetal movements and heart rate variability, in line with the effects of short-acting betamethasone and dexamethasone seen. Fetal heart rate (FHR) variation and fetal movements show a diurnal Ville Y.
Effect of dexamethasone and betamethasone on fetal heart.
It is known that corticosteroids have a direct, transient effect on fetal heart rate Pfetal movements felt by the mother (+60% at day 0, Effect of dexamethasone and betamethasone on fetal heart rate variability in. Reduction or cessation of fetal movements after administration of steroids for Movement/drug effects*; Heart Rate, Fetal/drug effects; Humans; Pregnancy. Steroid shots are well known to decrease fetal movement - lasts for 2-3 side effects, and I found it very scary when the baby stopped moving.