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The results also showed that fingernails now grow by 3.47mm every month â almost twice as fast as toenails. The nails of younger people and men grow faster. The little finger nail grows much more slowly than other fingernails, at a rate of 3.08mm each month. The middle finger has the fastest-growing nail.
The rapid growth that your baby has been experiencing now begins to slow a little. By week 20 your baby measures about 18 centimetres from crown to rump and is half as long as it will be when born. The legs are now in proportion with the body and the fingernails are well developed.