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  • And that, is how fertilization works.
  • Currently, however, we are still in the first trimester. The first trimester lasts from the last period until week 12.
  • During the first trimester, all tissues, organs and systems begin to develop. The placenta starts to develop as well. At the end of eight weeks, the embryo will be called a fetus. Gastrulation happens during this period of time.
  • The second trimester is a period of rapid growth. The tissues of the fetus becomes more specialized and begins to function. Now, the heart is larger and can be heard by a stethoscope; the early skeleton also starts to form. Lanugo also starts growing.
  • And by the third trimester, the fetus' organs start to mature and prepare for the outside world. It completes is development.
  • Then finally, after approximately nine months, the fetus is ready for birth. Normal birth occurs in three stages: dilation, expulsion and the placental stage.
  • And that where babies are from. In fact, it is where all life on earth, including you and me, comes from!
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