STAT3 and cardiac hypertrophy: The best characterized miRNA-regulated pathways in pregnancy-induced cardiac hypertrophy include phosphoinositide-3-kinase/protein kinase B/glycogen synthase kinase 3β (PI3K/Akt/ GSK3β) signaling, mitogen-activated protein kinase (MAPK) signaling, calcineurin signaling, and signal transducer and activator of transcription 3 (STAT3) signaling [34, 35].