The Visible EmbryoHome
Home----History-----Bibliography-----Pregnancy Timeline-----Prescription Drugs in Pregnancy---- Pregnancy Calculator----Female Reproductive System----News Alerts----Contact

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.

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

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.

original work, are licensed under a

Creative Commons License

Content protected under a Creative Commons License. No dirivative works may be made or used for commercial purposes.