Every human being is a product of fertilization of a sperm and an egg cell. Within nine months, this fertilized egg will undergoe series of changes and development inside the so-called "most comfortable place on earth, the uterus." This is where the real bonding between the mother and the fetus take place.
The baby grows and changes from a small group of cells to a fully developed baby ready to begin life. The designation between "embryo" and "fetus" is somewhat arbitrary. During the first 8 weeks of development (10 weeks of gestation), the developing baby is called an embryo. From 8 weeks of development until delivery, it is called a fetus.
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