Iud after labor?

I got opinions from two different doctors about implanting an iud immediately after passing the placenta as opposed to waiting 6 weeks to be implanted then. I've gotten a lot of criticizism from a mom group for this, everyone thinks I should wait that the risk outweighs the gain. But I have no desire to become pregnant or even chance it because I'm currently living in a state that doesn't support reproductive rights, and if I became pregnant it would be very difficult for me to come by an abortion. 
Has anyone EVER had an iud implanted immediately following giving birth and not at their 6week check up after the fact? I want opinions from women who also chose this method.