Prenatal devices gain fans, critics  For the first half of her
pregnancy, Suzanne Ling played classical music for her unborn
child whenever she drove her car. She had heard about “the
Mozart effect” from a friend, who swore that classical music
soothed her baby both pre- and post-delivery.  Around week 20,
Ling discovered BabyPlus, an egg-shaped device that she wore
around her growing abdomen. The device played 16 “audio lessons”
of heartbeatlike tones and promised to teach a fetus to
recognize patterns and differentiate sounds. After Alexander was
born, Ling was certain that he was especially engaged, aware and
smart. She's convinced that his exposure to the in utero
“lessons” will help him avoid autism and attention-deficit
hyperactivity disorder.  BabyPlus is one of a small number of
“prenatal learning systems” being marketed to expectant parents
these days. With such names as Lullabelly, Bellysonic and
FirstSounds, they offer up soothing tones or foreign languages
as they promise anxious parents a better,