Teratogens 10-24 - o Teratogens o Smoking during pregnancy...

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o Teratogens o Smoking during pregnancy is estimated to account to 20-30% of low- birth weight babies, up to 14^ of preterm deliveries, and some 10% of all infant deaths. o More likely to develop asthma o Nicotine and carbon monoxide reach fetus through placenta and prevent fetus from getting nutrients/oxygen needed to grow. o Infant Growth Patterns o Cephalocaudal pattern – greatest development takes place at the top of the body, and physical development moves gradually downwards Get control of shoulder before get control of elbows and hands o Proximodistal pattern – growth starts at the center of the body and moves towards extremities o Brain development o At birth, a baby has a 100 billion neurons, and 50 trillion synapses o First 3 months – synapses multiply more than 20 times o At 3 years old child has twice as many connections as an adult o Pruning- removal of connections that are not used o Motor development o Infant reflex – an involuntary response to a particular stimulus
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