I usually suggest starting the prenatal formula at six to four weeks before your due date. The normal schedule is: 6 weeks before take one capsule 2x's/day
5 weeks before take one capsule 3x's/day
4 weeks before take two capsules 3x's/day
3 weeks before take three capsules 3x's/day
Continue this dosage until birth.
In my experience, this formula makes a big difference in how well the labor goes. If this schedule brings on too many pre-term contractions, then just cut back on the dosage. The thing most people don't stop to realize is that the uterus is a muscle - as it prepares for labor, it will start working out/practicing, if you will. It is common to have contractions for the last month of pregnancy as the uterus prepares itself for the marathon. If they are too frequent or intense, then the dosage should be reduced. The key is to recognize what is happening so that you do not panic and run to a hospital.