These fingerprints begin development as early as the second and third month of pregnancy, when the fetus is still 1-3.5 inches in size! In 6 months time, the fingerprints and footprints are already fully formed, though the rest of the baby still has a lot of growing to do. These fingerprints come about when the middle layer of skin starts to outgrow inner dermis and epidermis skin layers, causing folds.
Learn more facts about fingerprints can be found at LiveStong.com.
19 Interesting Facts