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Carnegie Stage 3 - First Trimester
Intestines Recede Into Body Cavity
•••••
SIZE: 17.0 - 22.0 mm

TIME PERIOD: 53 - 54 days post-ovulation

Head and Neck
Eyes are well-developed, but are still located on the side of the embryonic head. As head development continues, they will migrate forward. External ears are set low on the embryo's head, but will move up as the head enlarges. Over the next few days, tongue development finishes.

Abdomen
Intestines begin migration within the umbilical cord towards the embryo. Liver causes a ventral prominence of the abdomen.

Limbs
Fingers lengthen while distinct grooves (digital rays) form between the fingers, which also lengthen as the hands approach each other across the abdomen. Feet approach each other, but are still fan-shaped and the toe digits are still webbed.

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