Invasive implantation and intimate placental associations in a placentotrophic african lizard, Trachylepis ivensi (scincidae)

@article{Blackburn2012InvasiveIA,
  title={Invasive implantation and intimate placental associations in a placentotrophic african lizard, Trachylepis ivensi (scincidae)},
  author={Daniel G. Blackburn and Alexander F. Flemming},
  journal={Journal of Morphology},
  year={2012},
  volume={273}
}
In the viviparous lizard Trachylepis ivensi (Scincidae) of central Africa, reproducing females ovulate tiny ∼1 mm eggs and supply the nutrients for development by placental means. Histological study shows that this species has evolved an extraordinary placental pattern long thought to be confined to mammals, in which fetal tissues invade the uterine lining to contact maternal blood vessels. The vestigial shell membrane disappears very early in development, allowing the egg to absorb uterine… 
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