- Pregnancy at 1-3 Weeks
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How Your Baby Has Grown 8 Weeks
Your baby's development
Skin:
Skin is translucent. Fingers and toes are webbed.
Muscles:
Muscles are developing and tiny movements begin.
Bones:
The soft, pliable cartilage is starting to harden and lengthen. Joints are distinguishable and there are tiny movements of the spine.
Organs:
All major internal organs are in place and developing.
Circulatory system:
The four chambers of the heart are forming and the heart is beating approximately 170 times per minute.
Digestive system:
Stomach and intestines have developed. The muscles of the digestive tract are already functioning.
Nervous system:
The brain and spinal cord are now in place.
Urinary system:
Kidneys are preparing to produce urine.
Respiratory system:
Lungs have formed and will continue to develop.
Ears:
Outer ear structures are developing on each side of the neck.
Eyes:
Eyes are wide apart on the sides of the head. Eyelids are starting to form over them.