What To Expect At Week 4
As you become 4 weeks pregnant, your baby is going to be about the size of a poppy seed. The cells of your baby are going to split up into 3 groups. One will form the neural tube, the other will form the muscle and the bone, and the third group forms the lungs, intestines, and urinary tract. You can also start prenatal vitamins if you haven’t already done so.
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