Final answer:
Plantar creases in a preterm baby may be less developed or absent compared to a more mature baby. The creases become more prominent and well-defined as the baby grows and matures.
Step-by-step explanation:
The plantar creases in a preterm baby may be less developed or absent compared to those in a more mature baby. These creases are formed by the folding of the skin on the soles of the feet. As the baby grows and matures, the plantar creases become more prominent and well-defined.
For example, a preterm baby born at 28 weeks may have fewer plantar creases or creases that are not as deep as a baby born at full term (around 40 weeks). However, it is important to note that the presence or absence of plantar creases alone is not a reliable indicator of maturity, as other factors such as gestational age and overall development need to be considered.