We are now 13 weeks pregnant!
The baby has grown to about 3 inches long.
Bone is beginning to replace cartilage and the ribs are appearing.
The nose and chin are well defined.
Movements can be measured.
The baby will begin to learn to suck its thumb.
The baby can open and close its mouth.
The external genitalia are well defined making it is possible to determine the baby's gender.
The baby is now producing insulin the hormone that controls their blood glucose.
Unique fingerprints are already in place. Muscles lengthen and become organized.
The first three months were period of rapid development, next three months will be period of rapid growth. Babies quadruple weight during the 4th month.
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