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In weeks 1-3 the placenta's brain, spinal cord, heart, and digestive system organs begin to develope.
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Arms and legs grow longer, you can see their feet and hands but they are webed. the lungs begin to form. Most vital organs are developed.
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The face and its features are well formed. the head makes up nearly half of hte fetus' size. tooth buds appear.
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All major organ systems are develpoed and functioning. Fine hair called lanugo developes on hte head. Genitals are reconizable. Bones become harder. Fetus starts moving around.
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lanugo covers the entire body. Eyebrows and eyelashes appear. Nails appear on hte fingers and toes. Fetal heartbeat can be felt with a stethoscope.
