Here are a few tips:

• Avoid strenuous physical activities for 24 hours before the sample is taken.
• If you are asked to observe a fasting period, do not eat after 8 p.m. and do not drink alcoholic beverages, sodas or fruit juices. You can drink water. On the morning of the sample, do not have any breakfast. You may have water or black coffee without sugar or milk.
• Sit and relax during the 10–15 minutes before the sample is taken.
• When the sample is being taken, remember to tell the staff about any medications you are taking so that the results of your analyses are not distorted.

By following these guidelines, your examination will take place in the best possible conditions.