Some of the risks associated with heroin use during pregnancy include:
Birth defects
Premature birth (birth that occurs before 37 weeks of pregnancy)
Low birth weight (when babies weigh less than five pounds, eight ounces at birth)
Placental abruption (separation of the placenta from the wall of the uterus during pregnancy)
Stillbirth (when a fetus dies in the womb after 20 weeks of pregnancy)
Neonatal abstinence syndrome (NAS, a group of conditions that occur in babies exposed to heroin and opioids while in the womb)
Sudden infant death syndrome (SIDS, the unexplained death of a baby under the age of 1)
Transmission of viruses like HIV, AIDS, and hepatitis to the baby