During the first weeks of pregnancy, the developing placenta in a mother's womb undergoes a dramatic change. Individual cells merge, forming a continuous barrier that will spend the next nine months ...
During the first weeks of pregnancy, the developing placenta in a mother's womb undergoes a dramatic change. Individual cells merge, forming a continuous barrier that will spend the next nine months ...
A report released Monday by the infant and maternal health nonprofit March of Dimes says that only about 75% of babies last ...
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