Eggs and embryo development....but not just chameleons...

[kinyonga]

Skinks...vibrations made them hatch...
http://www.huffingtonpost.ca/entry/lizards-hatch_n_3023214

Madagascar ground geckos....
http://onlinelibrary.wiley.com/doi/10.1002/dvdy.21828/full

Chameleon chamaeleons...arsenic, PCB, etc in eggs...
http://www.sciencedirect.com/science/article/pii/S0045653506018212

Furcifer labordi...
https://www.newscientist.com/article/dn14226-violent-sex-means-chameleons-die-young/