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Chapter 6 Opener Human blastocyst (at right) emerging from its zona pelucida
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Figure 6.1 An unfertilized ovum
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Figure 6.2 Maturation of sperm
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Figure 6.3 Fertilization and production of the conceptus
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Figure 6.4 Development of the human conceptus
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Figure 6.5 Blastocyst in the process of implanting itself
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Figure 6.6 Stages of prenatal development
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Figure 6.7 Alfred Jost’s experiments on rabbits
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Figure 6.8 The genetic basis of sex determination
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Box 6.1 Biology of Sex: Atypical Development: Chromosomal Anomalies
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Figure 6.9 Sex determination
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Box 6.2 Biology of Sex: Atypical Development: Gonadal Intersexuality
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Figure 6.10 Migrating germ cells
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Figure 6.11 Development of the male and female reproductive tracts
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Box 6.3 Biology of Sex: Atypical Development: Androgen Insensitivity Syndrome
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Figure 6.12 Development of the male and female external genitalia
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Figure 6.12 Development of the male and female external genitalia (Part 1)
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Figure 6.12 Development of the male and female external genitalia (Part 2)
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Figure 6.12 Development of the male and female external genitalia (Part 3)
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Box 6.4 Biology of Sex: Atypical Development: Congenital Adrenal Hyperplasia
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Figure 6.13 Descent of the testes
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Figure 6.13 Descent of the testes (Part 1)
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Figure 6.13 Descent of the testes (Part 2)
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Box 6.5 Biology of Sex: Atypical Development: 5α-Reductase Deficiency
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Box 6.6 Biology of Sex: Atypical Development: Hypospadias and Micropenis
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Figure 6.14 The third interstitial nucleus of the anterior hypothalamus (INAH3)
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Figure 6.15 Sexual differentiation in the hypothalamus
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Figure 6.16 Copulating rats
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Figure 6.17 Hormones and sexual behavior in rats
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Figure 6.18 When monkeys copulate, the male often grasps the feet or legs of the female with his own feet
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Photo, p. 177 1957 advertisement for DES in a medical journal
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Photo, p. 178 Because of variations in the timing of puberty, these 12-year-old girls vary a great deal in their physical development
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Figure 6.19 Growth velocity curves for boys and girls
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Figure 6.20 Typical development of pubic hair in girls at puberty
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Figure 6.21 Typical development of breasts in girls at puberty
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Figure 6.22 Puberty is starting earlier
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Figure 6.23 Typical development of male external genitalia at puberty
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Figure 6.24 Hormonal control of puberty
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Box 6.7 Biology of Sex: Atypical Development: Precocious and Delayed Puberty
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Figure 6.25 MRI slice through the human brain showing some of the regions whose size is affected by sex hormone levels at puberty
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Box 6.8 Personal Points of View: My Life with Androgen Insensitivity Syndrome
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