Main Article on Miscarriage Question: What was the cause of your miscarriage? Submit Your Comment Comment from: Shanthi, 25-34 Female (Patient) Published: May 30 I had hypothyroidism which I couldn't control during my second pregnancy. And I lost my six weeks baby in womb. I felt so sad that I couldn't control my hormone levels. But I hope I will have a healthy baby in future. Comment from: Aseni, 19-24 Female (Caregiver) Published: October 12 Maternal sleep deprivation, sedentary lifestyle and cooking smoke are risk factors for miscarriage. Medically reviewed by Wayne Blocker, MD; Board Certified Obstetrics and Gynecology REFERENCE: "Early Pregnancy Loss." MedscapeReference. Updated Nov 14, 2015.