To study the mortality and morbidity of unsafe abortion in a University Teaching Hospital. A cross-sectional, descriptive study was conducted in Department of Obstetrics and Gynaecology, Unit III, Dow Medical College and Civil Hospital Karachi from January 2005 to December 2009. Data regarding the sociodemographic characteristics, reasons and methods of abortion, nature of provider, complications and treatment were collected for 43 women, who were admitted with complications of unsafe abortion, and an analysis was done. The frequency of unsafe abortion was 1.35% and the case fatality rate was 34.9%. Most of the women belonged to a very poor socioeconomic group (22/43; 51.2%) and were illiterate (27/43; 62.8%). Unsafe abortion followed an induced abortion in 29 women and other miscarriages in 14 women. The majority of women who had an induced abortion were married (19/29, 65.5%). A completed family was the main reason for induced abortion (14/29; 48.2%) followed by being unmarried (8/29, 27.5%) and domestic violence in 5/29 cases (17.2%). Instruments were the commonest method used for unsafe abortion (26/43; 68.4%). The most frequent complication was septicaemia (34; 79%) followed by uterine perforation with or without bowel perforation (13, 30.2%) and haemorrhage (9; 20.9%). Majority of induced abortions were performed by untrained providers (22/26; 84.6%) compared to only 3/14 cases (21.4%) of other miscarriages (p= 0.0001). The high maternal mortality and morbidity of unsafe abortion in our study highlights the need for improving contraceptive and safe abortion services in Pakistan.