In 2% of pregnancies, pathogens cross the _______ and infect the embryo or fetus.
Answer: placenta
In 2% of pregnancies, pathogens cross the _______ and infect the embryo or fetus.
Answer: placenta
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Biology
In 2% of pregnancies, pathogens cross the _______ and infect the embryo or fetus.
Answer: placenta
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