 Usually, only one egg develops, with the remaining eggs serving as nutrition for the embryo, which results in a single juvenile snail hatching from each capsule.Juveniles with a shell length of 0.5–1 mm hatch after 30 days (in 25 °C), or after 65 days (in 20 °C).The ash-free dry weight of newly hatched snails is 0.012 mg.