Thanks for the input. It's helping me to see a bigger picture.

I once collected a gravid female concinnus from one of my local hotspots for large specimins. It was really a bit early in the spring/season for them to be out and about, but they were forced from their dens early by a severe rise in the water table and were really easy to find since they were concentrated on higher ground.(Spring 1997, after the infamous FEB 1996 WA floods)

Apparently, this female had retained her young through the winter, and gave birth in spring of 1997. She looked to be very old(although not more than 2/3 maximum size for her species) and not very healthy.

She gave birth to 18 stillborns. Some of them were clearly decayed. She died several days later. It was a harshly cold winter followed by extreme flooding though.