I too had the injections, but I was given fragmin (I think it was called)-even though I got out of bed and was moving around. At my hospital, you only received the injection if you had a PPH(post partum haemorrhage) and a c section. As I had both, I had the injections. And yeah, they stung and left big marks on my legs! By the end of my hospy stay, there wasn't a part of my thigh that hadn't been injected. I looked like a druggie.