And if so, how long after starting the supplements did your troubles begin?
I started on tablets 2 days ago (two tablets a day) with the knowledge that some people get constipated, but I'm worried that actually it happens to most women! not just 'some' 
I was talking to my sister about it and she said when she'd been pregnant she also had to take supplements and she didn't poo for AGES and she was in so much pain that she eventually refused to take them - by the time she gave birth her iron levels were at 7 
She said though that her troubles didn't start straight away and actually didn't start suffering until she'd been on them for a few weeks. Is that quite common??
And what happened if your constipation became unbearable?
Were you expected to just put up with it?