Labor is primarily a phenomenon that is out of your control. But there are some things you can do to have a positive impact on your labor and childbirth experience.
Another of the early signs of labor is your cervix beginning to open, or dilate. For most women, some dilation occurs before labor. Your health care provider will measure the dilation in centimeters from zero to 10.
Nearing labor your body will produce prostaglandins, a chemical which will cause loose bowel movements. A very unpleasant sign of impending labor, but one which does let you know the baby is coming soon. If you have been suffering from constipation, this may be a bit of a relief. Gas, which is so common throughout pregnancy, will also become more of an issue.