|aWhy do I have periods? : |bmenstruation and puberty / |cIsabel Thomas
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|aChicago, Ill. : |bRaintree, |cc2011
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|a32 p. : |bcol. ill. ; |c27 cm.
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|aInside my body
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|aIncludes bibliographical references and index
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|aWhat is a period? -- Why do I need to go through puberty? -- How does puberty start? -- How will my body change? -- Why do girls get periods? -- Why do periods come every month? -- What's it like to have a period? -- How does a woman's body grow a baby? -- Why don't boys have periods? -- How else do hormones affect my body? -- How will I feel when puberty starts? -- What is the best way to cope with puberty?