Illustration of fetal genital development

Illustration of fetal genital development

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Credit: JOHN BAVOSI/SCIENCE PHOTO LIBRARY

Caption: Illustration of human genital development and sex differentiation. In the fetus, both male (left) and female (right) external genitalia pass through an undifferentiated state (upper frames). A glans is present in both (at top); a urethral groove runs along the phallus (middle); raised margins of the groove are genital folds which extend in a ridge to the anus. At the eighth week of pregnancy sex changes begin. In the male (lower left) the genital fold seals to form a penis shaft; glans growth occurs; genital swellings form the testes. In the female (lower right), genital folds remain open from which vagina and urethra open; the glans forms the clitoris; genital swellings the labia.

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Keywords: anatomy, art, artwork, clitoris, development, female anatomy, fetus, foetus, genital, genital dev., genital development, human body, male anatomy, penis, vagina

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