Then entropy would prevent you from developing from a fetus to an adult.
If it does not, AND if it does not stop you from reproducing, then it does not affect evolution. Sorry.
This is simplistic reasoning. When you have all the mechanisms in place that allow for the development of the fetus then you will get the adult. The problem is when you don't have all the mechanisms in place and you are relying on a roulette wheel of chance to get you the advancement. The Second Law of Thermodynamics is all about probability which is the root cause why you cannot get advancement. Life is designed with robustness or else it would just die out. All this points to ID, the rational view of our existence.