First of all, labor is expensive in Germany and paying for childcare is not worth the expense. Moreover, mothers are socially expected to raise their children themselves, and those who don't are labeled "raven mothers" (Rabenmutter, I.e. heartless mothers who have abandoned their children).
一來德國人工貴，請褓母不划算；再者，社會觀念中，孩子就是要自己親手照顧，否則會被貼上「烏鴉媽媽」（德文 Rabenmutter，狠心、棄子女於不顧的意思）的標籤。