Mammalian reproduction
Most mammals are viviparous, giving birth to live young. However, the five species of monotreme, the platypuses and the echidnas, lay eggs. The monotremes have a sex determination system different from that of most other mammals. In particular, the sex chromosomes of a platypus are more like those of a chicken than those of a therian mammal.
Male mammalMammal female reproductive systemMammal male reproductive systemMammalian female genitaliaMammalian female reproductive systemMammalian male genitaliaMammalian male reproductive systemMammalian male reproductive tractMammalian reproductive anatomyMammalian reproductive systemMammalian reproductive tractOutline of mammalian reproduction
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Mammalian reproduction
Most mammals are viviparous, giving birth to live young. However, the five species of monotreme, the platypuses and the echidnas, lay eggs. The monotremes have a sex determination system different from that of most other mammals. In particular, the sex chromosomes of a platypus are more like those of a chicken than those of a therian mammal.
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Most mammals are viviparous, g ...... after long gestation periods.
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Para entender la anatomía del ...... a externa conocida como vulva.
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743,963,824
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Most mammals are viviparous, g ...... han those of a therian mammal.
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Para entender la anatomía del ...... o con el del aparato urinario.
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Mammalian reproduction
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Reproducción de los mamíferos
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