Stretched out to read a bit today. In "Expectant Motherhood" from a doctor at Johns Hopkins, I learned that I should still take care with my makeup and hair each day (oops.) There are also informative passages such as, "there is no reason for believing that a woman who smokes moderately, let us say ten cigarettes or less a day, need change her custom at this time." Drinking alcohol, of course, is also fine. And rabbits are the high-tech way of finding out if you are pregnant for sure.
This might be just a tad out of date.