Shortlyafterbirth, synapsesformat a ratethat's fasterthananyothertimeperiodinourlives--it's knownastheexuberantperiodwhere a youngbraincancreateuptotwomillionsynapseseverysecond.
Andthere's prettyconvincingresearchthatshowslanguagedevelopmentstartsbefore a baby's evenborn, soit's probablynevertoosoonfor a pregnantmothertospeaktoherbaby.