Nazi ideology advocated excluding women from political involvement and confining them to the spheres of "Kinder, Küche, Kirche" (Children, Kitchen, Church). Many women enthusiastically supported the regime, but formed their own internal hierarchies. Hitler's own opinion on the matter of women in Nazi Germany was that while other eras of German history had experienced the development and liberation of the female mind, the National Socialist goal was essentially singular in that it wished for them to produce a child. Based on this theme, Hitler once remarked about women that "with every child that she brings into the world, she fights her battle for the nation. The man stands up for the Volk, exactly as the woman stands up for the family". Proto-natalist programs in Nazi Germany offered favourable loans and grants to newlyweds and encouraged them to give birth to offspring by providing them with additional incentives. Contraception was discouraged for racially valuable women in Nazi Germany and abortion was forbidden by strict legal mandates, including prison sentences for women who sought them as well as prison sentences for doctors who performed them, whereas abortion for racially "undesirable" persons was encouraged.
Heinrich Himmler's Schutzstaffel (SS) took full control of the police and the concentration camps throughout Germany in 1934–35. Himmler expanded the role of the camps to hold so-called "racially undesirable elements", such as Jews, Gypsies/Romanis/Sintis, Serbs, Poles, disabled people, and criminals. The number of people in the camps, which had fallen to 7,500, grew again to 21,000 by the start of World War II and peaked at 715,000 in January 1945.