Illustration of a pregnancy at five weeks (three weeks afterconception). This is the beginning of the embryonic period in which the baby's brain, spinal cord, heart, and other organs begin to form. The embryo develops in three layers: ectoderm (outer layer), mesoderm (middle layer), and the endoderm (inner layer).
Credit
Carol Werner
Dimensions
4998 x 5100 pixels
Print Size @ 300 dpi
17 x 17 inches / 42 x 43 cm