Final answer:
Lanugo in a preterm baby is temporary and normal as it is discarded a few weeks after birth, part of the fetus's natural development.
Step-by-step explanation:
The presence of lanugo, which is fine, colorless hair, in a preterm baby is temporary and normal. Lanugo starts to grow on the fetus's body during the gestational period, and it is usually discarded by the fetus before the time of birth. However, if the baby is born prematurely, they might still exhibit this kind of hair, which is ultimately shed a few weeks after birth as part of the natural development process.