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| | UNSW Embryology- Echidna Development |
 | | The echidna is a unique egg-laying mammal, the embryo is referred too as a "puggle" (not to be confused with the dog breed, produced by mating a Pug with a Beagle) and is not a common animal model of mammalian embryonic development. |
 | | Marsupial mammals have relatively short gestation periods and give birth to highly altricial young that continue a significant amount of ‘fetal’ development after birth, supported by a highly sophisticated lactation. |
 | | A combination of mammal, reptile, and marsupial, echidnas produce milk, but unlike mammals, they are egg-laying creatures and, like marsupials, they have a modified pouch for nurturing their young. |
| embryology.med.unsw.edu.au /OtherEmb/echidna.htm (909 words) |
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