Well once the war is over, and you are in cold war/antipartisan mode the Nazi will push even harder on women not working, or in limited areas. Payments per birth, the Lebensborn program, and the "Aryanization" of suitable children from captive populations will be going on. Among Aryans, mortality of children should be pretty low, for those Untermenschen allowed to breed, rather the opposite. With the programs listed here the "Aryan" population increase/birthrate will be high, four or more children per family being the norm. For the Untermenschen, the population/reproduction rate will be set much lower, to satisfy the needs of the Reich for slave laborers, human lab rats etc. Some populations, lie the Norwegians, Danes, and pissbly the Dutch, will be Germanized, others like the French and Belgians not sure.