Sandra felt as low as the heels of her shoes as she pushed against a November gust and the florist shop door. Her life had been easy, like a spring breeze. Then in the fourth month of her second pregnancy, a minor automobile accident stole her ease.

During this Thanksgiving week she would have delivered a son. She grieved over her loss. As if that weren’t enough, her husband’s company threatened a transfer. Then her sister, whose annual holiday visit she coveted, called saying she could no...