![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | newborn, 140, 318
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | breastfeeding, 151-61
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | oxytocin levels in, 316
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | sexuality of, 163-44
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | stress hormone levels in (during birth), 317
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | See also Adolescence
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | China, 127, 249, 315
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Cholecystokinin (metabolic hormone), 316-17
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Cholesterol, 181-82
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | HDL and LDL (high-and low-density lipoprotein), 188, 190
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Chromosomes
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | chimpanzee genes, 14
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | numbers of genes carried by, 19-20, 23
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