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- size of a pin head
- brain and spinal cord develop
- circulatory and internal organs form
- heart begins to beat
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- size is about a fourth of an inch
- face, limbs, eyes, and ears form
- bones form
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- As month begins the size is about 1 inch
- mouth, eyelids, nostrils, lips form, all organs immature yet, present
- fingers and toes almost complete
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- 3 inches in size
- weighs about 1 ounce and facial features become clear
- can swallow, suck thumb, hiccup, and move around
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- Hair, lashes, and eyebrows form
- weighs 4-5 ounces and is size of 6-7 inches
- teeth develop further
- becoming more active
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- Size is about 8-10 inches
- Breathing begins
- 8-12 ounces
- fat starts to deposit under skin
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- 10-12 inches in size
- weighs 1.5-2 pounds
- Has activity of activity and periods of rest
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- 14-16 inches
- Rapid gaining weight
- may react to loud noises with a jerk
- moves into a head-down position
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- Descends into pelvis
- size is 17-18 inches and weighs 5-6 pounds
- movements decrease with less room to move around
- Acquires antibodies to fight off diseases