Placenta does a lot of thing, the main function is really to control the nutrient transfer from mum to the baby, but it also controls a lot of thing. It ensures that baby is protected from harmful substance, so when placental function is weakened due to various factors the baby is at risk of getting exposed to imbalanced nutrients and/or harmful substance.
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Anya commented on :
thank you that was a very helpful answer.
you are very good at answering.