Heroin crosses the placenta and the baby can become dependent on the drug. Heroin is also called horse, smack, junk, and h-stuff. The baby has a high chance of premature birth, low birth weight, breathing problems, low blood sugar, bleeding within the brain, infant death, born addicted to heroin, and can suffer from withdrawal symptoms. Withdrawal symptoms include irritability, convulsions, diarrhea, fever, sleep abnormalities, and joint stiffness. Other symptoms include yawning, sneezing, sweating, nasal stuffiness, irritability, inability to sleep, vomiting, diarrhea, progressive weight loss, and discoloration of the skin due to low blood oxygen levels. Studies show the incidence of Sudden Infant Death Syndrome (SIDS) in babies born to addicts to be five times higher than other controlled groups.