Gestation 12-24 weeks
U.S. figures include both hysterotomy and
Hysterotomy abortion is a form of abortion in which the uterus is opened through an abdominal incision and the fetus is removed, similar to a caesarean section, but requiring a smaller incision. As major  abdominal surgery, hysterotomy is performed under general anaesthesia, and is only used in rare situations where less invasive procedures have failed or are medically inadvisable (such as in the case of placenta accreta). It is used between the 12th and 24th week of  pregnancy. 
This method has the greatest risk of complications out of all the abortion procedures.
Health officials in the  United States warned practitioners against performing hysterotomy abortion in an outpatient setting after it led to the deaths of two women in New York during 1971.  The rate of  mortality of abortion by hysterotomy and hysterectomy reported in the United States between 1972 and 1981 was 60 per 100,000, or 0.06%. 
References [ edit ]
^ Abortion. (2007). MSN Encarta. Retrieved July 1, 2007. Archived 2009-10-31.
^ a b c Roche, Natalie E. (June 16, 2006). Surgical Management of Abortion. Retrieved July 1, 2007.
^ Berger GS, Tietze C, Pakter J, Katz SH (March 1974). "Maternal mortality associated with legal abortion in New York State: July 1, 1970--June 30, 1972". Obstet Gynecol 43 (3): 315–26. PMID 4814448.
^ Stroh G, Katz SH, Hinman AR (October 1975). "Performing second-trimester abortions. Rationale for inpatient basis". N Y State J Med 75 (12): 2168–71. PMID 1059921.
^ Grimes DA, Schulz KF (July 1985). "Morbidity and mortality from second-trimester abortions". J Reprod Med 30 (7): 505–14. PMID 3897528.