What is happening to your baby during the nine months of pregnancy?
1 month
The cell obtained when the sperm and egg fused is called the "zygote". From that moment, the baby's sex is defined. Between 30 and 50 hours after fertilization, this cell begins to segment is. This cell then becomes a "blastocyst" and moves into the uterus to be fixed at the 7th day: the implantation. At the end of the first month, the principal organs of your baby begin to develop and the head is already formed. He is about 5 mm, about the size of a pea!
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