If they did go to work, was it handled by the community, the government, or the employer? Please elaborate as much as you would like. I've never once heard anything about this that I can recall.
A lot of women, even married women with children, took up jobs to help in the war effort. Many unmarried women were also (and especially) encouraged to help. Some places offered day care, but those instances are few and far between. Most women left the kids with a mother or mother-in-law, or in the care of their eldest child. Unlike before the war, where married women with children were discouraged from working outside the home, the massive lack of workers during WWII changed that, at least for the duration of the war. There are tons of sources on this, but here are a few:
Creating Rosie the Riveter: Class, Gender, and Propaganda During World War II
Gender at Work: The Dynamics of Job Segregation by Sex During WWII
A Mother's Job: The History of Day Care, 1890-1960
During World War II, the federal government supported a nationwide program of child care centers, intended to boost war production by freeing mothers to work. Labor force participation of women grew significantly during the war, and children of working mothers were eligible for the child care service. The centers had a peak enrollment near 130,000 children in 1944.
Source: CHILD CARE: THE FEDERAL ROLE DURING WORLD WAR II by the Congressional Research Service