Hi Siobhan,
If the lady was already receiving Reflexology I would continue to treat as normal.
My wife is treating a lady who is trying to conceive and, at her last treatment about a week ago, she told my wife that she had miscarried at about 6 weeks. She still wants and is having Reflexology beacuse she is convinced that it will help her conceive and have an easy pregnancy.
So much depends on the lady concerned and at what time she miscarried. She might not want to see anyone or receive treatment if the miscarriage occurs late in the pregnancy - although I do believe that regular Reflexology would help a lady, in this circumstance, to recover from the effects - both physical and mental - and perhaps prepare her for her next attempt.