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Karman also developed the "super coil" abortion technique, which he believed would enable lay practitioners to perform second-[[Pregnancy|trimester]] abortions with little training or equipment. The coils were inserted into the [[uterus]], where they caused irritation leading to the expulsion of the [[fetus]]. However, both of Karman's documented trials with super coils were failures.

Karman also developed the "super coil" abortion technique, which he believed would enable lay practitioners to perform second-[[Pregnancy|trimester]] abortions with little training or equipment. The coils were inserted into the [[uterus]], where they caused irritation leading to the expulsion of the [[fetus]]. However, both of Karman's documented trials with super coils were failures.

The first trial took place in [[Bangladesh]]. Karman had been invited there by the government of Bangladesh and by the [[International Planned Parenthood Federation]], to perform abortions on women who had been raped by soldiers. Karman augmented his super coils with pieces of [[balsa]] wood. The women suffered a high rate of complications, leading health officials to investigate.<ref>Judith P. Bourne, R.M., et al., "Medical Complications from Induced Abortion by the Super Coil Method," ''Health Services Report'' v. 89, n. 1, January-February 1974</ref>

The first trial took place in [[Bangladesh]]. Karman had been invited there by the government of Bangladesh and by the [[International Planned Parenthood Federation]], to perform abortions on women who had been raped by soldiers. Karman augmented his super coils with pieces of [[balsa]] wood. The women suffered a high rate of complications, leading health officials to investigate.<ref>Judith P. Bourne, R.M., et al., "Medical Complications from Induced Abortion by the Super Coil Method," ''Health Services Report'' v. 89, n. 1, January–February 1974</ref>

The second trial took place in [[Philadelphia]], [[Pennsylvania]] on May 8, 1972. The [[Jane Collective]] in [[Chicago]] had been raided, and the members who performed abortions jailed. The remaining members arranged to take a [[bus]] load of women to [[Philadelphia]], for abortions to be performed by Karman and an assistant. The abortions were performed at an [[abortion clinic]] that was openly operating, in violation of Pennsylvania law. A local woman's group, outraged that the women were being subjected to an untested and possibly unsafe abortion method, protested outside the clinic, letting the air out of the bus tires. A public television crew from a station in [[New York]] filmed the procedures at Karman's invitation.  

The second trial took place in [[Philadelphia]], [[Pennsylvania]] on May 8, 1972. The [[Jane Collective]] in [[Chicago]] had been raided, and the members who performed abortions jailed. The remaining members arranged to take a [[bus]] load of women to [[Philadelphia]], for abortions to be performed by Karman and an assistant. The abortions were performed at an [[abortion clinic]] that was openly operating, in violation of Pennsylvania law. A local woman's group, outraged that the women were being subjected to an untested and possibly unsafe abortion method, protested outside the clinic, letting the air out of the bus tires. A public television crew from a station in [[New York]] filmed the procedures at Karman's invitation.