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The Biology of Prenatal Development




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The Fetal Period (8 Weeks through Birth)

Chapter 37   9 Weeks: Swallows, Sighs, and Stretches

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Chapter 38   10 Weeks: Rolls Eyes and Yawns, Fingernails & Fingerprints

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Chapter 39   11 Weeks: Absorbs Glucose and Water

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Chapter 40   3 to 4 Months (12 to 16 Weeks): Taste Buds, Jaw Motion, Rooting Reflex, Quickening

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Chapter 41   4 to 5 Months (16 to 20 Weeks): Stress Response, Vernix Caseosa, Circadian Rhythms

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Chapter 42   5 to 6 Months (20 to 24 Weeks): Responds to Sound; Hair and Skin; Age of Viability

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Chapter 43   6 to 7 Months (24 to 28 Weeks): Blink-Startle; Pupils Respond to Light; Smell and Taste

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Chapter 44   7 to 8 Months (28 to 32 Weeks): Sound Discrimination, Behavioral States

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Chapter 45   8 to 9 Months (32 to 36 Weeks): Alveoli Formation, Firm Grasp, Taste Preferences

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Chapter 46   9 Months to Birth (36 Weeks through Birth)

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