|
  |
 |
|
| Home----History-----Bibliography-----Pregnancy Timeline-----Prescription Drugs in Pregnancy---- Pregnancy Calculator----Female Reproductive System----News Alerts----Contact | |||
|
|||
and Hand Plate Begin
SIZE: 11.0 - 14.0 mm
TIME PERIOD: 44 - 48 days post-ovulation
Head and Neck
Nerve plexuses (network of intersecting nerves) begin to develop in the region of the scalp. Eyes are pigmented and eyelids begin to develop and may fold.
Thorax
Within the heart, the trunk of the pulmonary artery separates from the trunk of the aorta. Nipples appear on the chest. Body appears more like a cube.
Abdomen
Kidneys begin to produce urine for the first time.
Pelvis
Genital tubercle, urogenital membrane and anal membrane appear.
Limbs
The critical period of arm development ends, and the arms are at their proper location, roughly proportional to the embryo. However, the hand plates are not finished, but develop further in the next two days. The wrist is clearly visible and the hands already have ridges or notches indicating the future separation of the fingers and the thumbs.
Spine
Ossification of the skeleton begins
Content protected under a Creative Commons License. No dirivative works may be made or used for commercial purposes.