How and when can the hymen break?

What happens when the hymen breaks? Does the hymen break during the first time you have intercourse?

When a penis enters a vagina for the first time, the hymen (a small layer of skin that partially covers the vaginal canal) will most likely tear and may cause bleeding. Many females do have a small to moderate amount of blood when they engage in intercourse for the first time, but the bleeding usually subsides within a few hours to a day. If you do not see any blood after intercourse, the hymen may have stretched or broken earlier in life (possibly due to sports, horseback riding, gymnastics, insertion of a tampon, etc.). Many females do not experience pain or bleeding if their hymen has previously broken.  It is important to note that a woman can still be a virgin even if her hymen is no longer intact.