To cut a baby’s finger-nails deforms it; if the baby is a month old, to do this will cause the child to have fits.
Georgia.

To cut a baby’s finger-nails deforms it; if the baby is a month old, to do this will cause the child to have fits.
Source: Current Superstitions (1896), entry 56.
Fanny D. Bergen, editor.
Modern normalized navigation; the historical attribution above remains unchanged.