What is a miscarriage? A miscarriage is the spontaneous loss of a pregnancy that occurs before the 20th week of gestation.  A miscarriage can happen for many reasons, including: Problems with the baby’s chromosomes can contribute to 50% of losses. Women over the age of 40 years are at a higher risk of pregnancy loss. Problems with reproductive organs such as incompetent cervix, thin uterus lining, etc. Physical trauma such as falling, car accident, violence.…