Can we prevent pregnancy 100% using condom?

Question

Correct use of condom is essential for it to prevent pregnancy.
While removing from pack make sure you do not tear the condom. Hold the tip of the condom between your forefinger and thumb so that no air is trapped. Place the condom over the tip of the penis then roll it down over the erect penis. Make sure that the condom stays in place while you are having sex. If it comes off, stop and put on a new one. You should only take the condom off the penis when there is no further contact with your partner's body.

Niraj Mahajan · Accepted Answer

Correct use of condom is essential for it to prevent pregnancy.
While removing from pack make sure you do not tear the condom. Hold the tip of the condom between your forefinger and thumb so that no air is trapped. Place the condom over the tip of the penis then roll it down over the erect penis. Make sure that the condom stays in place while you are having sex. If it comes off, stop and put on a new one. You should only take the condom off the penis when there is no further contact with your partner's body.