how long is a baby an embryo
This is just the beginning. 1  The embryo is around 13 mm (1/2 inch) in length. 2  The heart is beating with one chamber. 3  A dividing wall is formed in the heart. 4  Arm and leg buds begin to grow. 5  The lower jaw and the vocal cords are beginning to form. 6  The mouth opening is formed. 7  The inner ear is being created. 8  The digestive tract is developing. 9  The ....