![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | sex during, 104, 350
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | spiral arteries during, 100, 108
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | swelling of breasts during, 125
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | visibility of, 339
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | without intercourse, 46
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | See also Birth process (parturition)
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Prehistory of Sex, The (Taylor), 137
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Premenstrual syndrome, 98, 201, 250-51
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Primates, nonhuman
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | age and fertility, 218
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | birth process, 308-9
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | clitoral size, 62-63, 76
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | DNA studies, 276, 334
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