Frequencies of vaso-occlusive crises (VOC) in patients with sickle cell disease (SCD) in relation to adenotonsillectomy: Epidemiologic evaluation of association

Drug misuse in pregnancy is a complex and increasing public-health problem. Estimates of drug misuse in pregnant women vary across the world and the populations studied. In the USA, the 2004 Survey on Drug Use and Health showed that 5% of American women reported the use of an illicit drug during pregnancy. In the UK, national estimates for pregnant drug users are lacking, but studies report that approximately a third of drug users in treatment are female and over 90% of these women are of childbearing age (15–39 years of age). A study comparing the profiles of pregnant drug users presenting to a perinatal addictions service in London (UK) found illicit heroin use (38%), followed by cocaine use (24%) as primary drugs of abuse, with polysubstance use common .