- The brain and the spinal cord begin to form.
- The heart begins to form.
- The stomach and intestines are forming.
- Bone tissue is growing.
- The eyes and ears are just beginning to form.
- The weight is less than one ounce.
- The length is less than 1/8 inch.
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© 2003 Texas Department of Health. All rights reserved. Photos: Lennart Nilsson / Albert Bonniers Forlag AB, A Child Is Born, Dell Publishing Company. Used by permission.