The birth of a baby indicates that a fertilized egg developed what strulture?

The birth of a baby indicates that a fertilized egg developed into a fully formed embryo and then a fetus within the uterus. This process involves the formation of various structures, including the placenta, which supports the developing fetus by providing nutrients and oxygen while removing waste. Over time, the embryo undergoes complex stages of development, ultimately resulting in a viable baby ready for birth.