What is a unfertile egg?

An unfertile egg is an egg that has not been fertilized by a sperm. This can occur for a number of reasons, including:

* The egg may not be mature enough to be fertilized.

* The sperm may not be able to reach the egg.

* The egg may be fertilized, but the embryo may not develop properly.

Unfertile eggs are not viable and cannot develop into a baby. They are typically expelled from the body during menstruation.

In some cases, an unfertile egg may be used in assisted reproductive technologies (ART), such as in vitro fertilization (IVF). In IVF, an egg is fertilized outside the body and then implanted into the uterus. This can help couples who are struggling to conceive naturally to have a baby.