Snails are born out of white/yellow eggs from their mother or father, as snails are hermaphrodites, and hatch approximately 2 or 4 weeks after being laid. For the baby snails to hatch, the weather has to be the perfect mix of warm and damp weather. read more
The snail produces new shell material, like the soft material of its protoconch, that expands its shell and then hardens. The part of the shell it was born with ends up in the center of the spiral when the snail and its shell are fully grown. read more