BALTIMORE — Nine women, some mothers, some expecting, sit chattering at a U-shaped table in a church hall on an October morning, happy to be out of the downpour outside. A few have young children underfoot. Guadalupe Franco, a community health worker, once as hungry for good parenting tips as these women are now, stands before them with a portable crib and begins a lesson on how to avoid endangering a sleeping infant. Babies should sleep alone, she explains in Spanish, on their backs and in a crib with tightly fitted sheets. Some of the women nod. No stuffed animals, Franco says firmly. No bla…