Pregnant women are notorious worriers. They fret over prenatal tests, maternity leave, baby names, labor, sleeping arrangements for their new arrival, child care, even food cravings. But generally their biggest worry is whether they’ll have a healthy baby. Not to worry. The odds are sky-high that when your child is born, she’ll be the picture of good health. But you can push those odds even higher by taking good care of yourself before and during pregnancy.