Healthy momma vs MC rate

Do you "feel" like you are going to have a healthy pregnancy? I'm statistically wondering if there is a correlation btwn ladies that are truly happy and consider themselves healthy (eat well, workout regularly, within good range of BMI, etc.) and less miscarriage rates.
Does being unhealthy, overweight, eating junk food regularly, never working out or generally depressed person correlate with a higher MC rate. 

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