The causes of miscarriage can be multifactorial. Common reasons include:
Chromosomal abnormalities - These account for more than 50% of miscarriages and occur when the fetus receives an abnormal number of chromosomes. Maternal health conditions - Conditions like uncontrolled diabetes, thyroid disorders, and autoimmune diseases can increase the risk of miscarriage. Infections - Certain infections, such as rubella or cytomegalovirus, can also contribute. Uterine abnormalities - Structural issues in the uterus or cervix can make it difficult to sustain a pregnancy. Lifestyle factors - Smoking, alcohol consumption, and illicit drug use are known risk factors.