Alcohol and drug use can certainly put your pregnancy at risk. Anything that you expose your body to, you are also exposing your baby to. Drugs and alcohol can also cause severe birth defects. It is wise to cut out these substances while you are pregnant. Women in their forties have an increased risk for miscarriage.
Some women miscarry continually, never able to carry a pregnancy to term.
The more miscarriages your body experiences, the greater your risk becomes for future miscarriages. If you have had three or four miscarriages, your doctor should look into why this is a chronic problem for you. Discuss your options with your doctor. There are things that you or your doctor can do to help minimize your risk for future miscarriages. An ectopic pregnancy occurs when a fertilized egg implants somewhere other than the uterus.