Swallowing and peeing
This is the period that, Your baby has started swallowing amniotic fluid and at the same time excreting urine, which he/ she then swallows again, the recycling at the full volume of fluid and after every few hours. He/She is also producing meconium. This is a black, sticky substance and will accumulate in her bowels, and this is what you will see her first dirty diaper.
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Fingerprints
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And this 13th week the finger Prints are forming on your baby’s tiny fingertips.