During the fifth week of embrionic development, the notochord, the neural tube, the brain and the spine are beginning to form.
Read the full article on: Five Weeks Pregnant: Development of the Baby and Symptoms of Mother ( 37).
By Miguel Barea Gómez M.D., M.Sc. (gynecologist), Zaira Salvador B.Sc., M.Sc. (embryologist) and Marie Tusseau (invitra staff).
Last Update: 07/29/2014