Some myths about the cause of miscarriage.

http://www.patient.co.uk/health/miscarriage-and-bleeding-in-early-pregnancy

Some myths about the cause of miscarriage

After a miscarriage it is common to feel guilty and to blame the miscarriage on something you have done, or failed to do. This is almost always not the case. In particular, miscarriage is not caused by lifting, straining, working, constipation, straining at the toilet, stress, worry, sex, eating spicy foods or normal exercise.

There is also no proof that waiting for a certain length of time after a miscarriage improves your chances of having a healthy pregnancy next time.