Several medical options exist for managing documented nonviable pregnancies that have not been expelled naturally. Occasionally a woman experiences several signs of miscarriage (bleeding and severe cramping) but her body still has some tissue remaining in her uterus. This is what is referred to as an incomplete miscarriage. Most times your provider will recommend a D&C (dilation and curettage) in order to prevent you from getting an infection.
Chromosomal problems due to a parent’s genes are, however, a possibility. This is more likely to have been the cause in the case of repeated miscarriages, or if one of the parents has a child or other relatives with birth defects.
Smoking more than 10 cigarettes per day is associated with an increased risk of pregnancy loss, and some studies have even shown that the risk of miscarriage increases with paternal smoking.