Final answer:
To be 100% sure about pregnancy, you can take a home pregnancy test or consult a healthcare professional for a blood test. It is important to remember that no method can provide 100% certainty outside of medical procedures.
Step-by-step explanation:
Being 100% sure about pregnancy can be challenging, but there are several methods you can use to increase your confidence. The most reliable way to determine if you are pregnant is to take a pregnancy test. Home pregnancy tests detect the presence of human chorionic gonadotropin (hCG) hormone in urine, which is produced during pregnancy. These tests are accurate when used correctly.
Another way to confirm pregnancy is to consult a healthcare professional who can perform a blood test to measure the hCG hormone level. Blood tests are more sensitive and can detect pregnancy earlier than urine tests.
It is important to remember that no method can provide 100% certainty outside of medical procedures like ultrasound or amniocentesis. Consulting a healthcare professional is the best way to confirm and monitor a pregnancy.