Related Rule
Israel
Practice Relating to Rule 92. Mutilation and Medical, Scientific or Biological Experiments
Israel’s Manual on the Laws of War (1998) states: “The rationale behind the law of war is that even in the midst of the inferno, there are grave deeds that must not be committed (… medical experiments).” 
Israel, Laws of War in the Battlefield, Manual, Military Advocate General Headquarters, Military School, 1998, p. 4.
Israel’s Manual on the Rules of Warfare (2006) states:
Even if it appears that in war everything is permissible and there is no differentiating between a moral and an immoral act, even in the heat of battle there are actions that are considered unacceptable (rape, the torturing of prisoners-of-war, medical experiments) and it is on these that the rules of warfare are based. Although the rules of warfare do not entirely prevent the horrors of war, they draw a line in the sand that must not be crossed, even in war. 
Israel, Rules of Warfare on the Battlefield, Military Advocate-General’s Corps Command, IDF School of Military Law, Second Edition, 2006, p. 8.
The Manual on the Rules of Warfare (2006) is a second edition of the Manual on the Laws of War (1998).