Mothers are likely to have more bad days on the job than most other professionals, considering the hours: round-the-clock, seven days a week, fifty-two weeks a year. . . . You go to work when you're sick, maybe even clinically depressed, because motherhood is perhaps the only unpaid position where failure to show up can result in arrest.

The truth invariably arrives several years after you need it.

With two sons born eighteen months apart, I operated mainly on automatic pilot through the ceaseless activity of their early childhood. I remember opening the refrigerator late one night and finding a roll of aluminum foil next to a pair of small red tennies. Certain that I was responsible for the refrigerated shoes, I quickly closed the door and ran upstairs to make sure I had put the babies in their cribs instead of the linen closet.

Women aren't trying to do too much. Women have too much to do.

By now, legions of tireless essayists and op-ed columnists have dressed feminists down for making such a fuss about entering the professions and earning equal pay that everyone's attention has been distracted from the important contributions of mothers working at home. This judgment presumes, of course, that prior to the resurgence of feminism in the '70s, housewives and mothers enjoyed wide recognition and honor. This was not exactly the case.

In the range of things toddlers have to learn and endlessly review--why you can't put bottles with certain labels in your mouth, why you have to sit on the potty, why you can't take whatever you want in the store, why you don't hit your friends--by the time we got to why you can't drop your peas, well, I was dropping a few myself.

It's an old trick now, God knows, but it works every time. At the very moment women start to expand their place in the world, scientific studies deliver compelling reasons for them to stay home.