"From its early days, the Nazi Party made a show of raw virility. 'I have seen the sex instinct deliberately aroused in many ways... At mass meetings, speeches dwelling on the copulative process of the Nazi male would send the Storm Troopers marching out of the hall all set for a demonstration. They never had to wait long for a partner. German women would wait outside the meeting places.' With Hitler intent on boosting the birth rate, newsstands displayed 'books and magazines filled with nude men and women...It was plain that Nazi Germany planned all this to but one end.' ... 'The word illegitimate must be blotted out of the German language,' Minster of Labor Robert ley declared... women who felt they needed more social respectability could legally take the name of a soldier who had died in battle.'...This created a class of women 'who clung to Nazism because the Nazi Party would protect their illegitimate children.'" (from Chapter 11 of Hitlerland).

In addition, the Nazi party had the Lebensborn program that encouraged Aryan births, and accepted Aryan children into government financed homes. They encouraged children born to German soldiers with mothers from occupied nations, to have the children adopted by Aryan families, and they financially supported these children. The Lebensborn program, which was run by the SS, declared every SS soldier should father a child before going to war. Overall illegitimacy ceased being a stigma and became patriotic.

Germans also made it easier to divorce, and 80% of new divorces were of men divorcing wives who were not fertile. Due to WWI, there were a lot more single women than single men. They planned to institute polygyny after the war ended, since World War II did nothing good for the male/female ratio, but they of course never got that far.

Could you provide a link to the relevant Wikipedia page?