Jasmine, these information below will answer your question, dear...
"As sperm swim through the vaginal canal and into the cervix, they hit a
"fork in the road," so to speak. At this juncture, some sperm travel to
one fallopian tube, while the rest move on to the other. However, only
one fallopian tube has a fertile egg at a given time. The sperm that
do not reach an "impasse" surround the mature egg and compete with the
other sperm in trying to penetrate it. If a woman's sexual and
reproductive health are in good working condition, the first sperm to
cross the finish line (enter the egg) succeeds in fertilizing it.
"Helper" sperm can also be credited for easing fertilization by allowing
this particular sperm access to and contact with the mature egg during
its trip. With conception initiated, the now fertilized egg sets off
some mechanisms, such as thickening of cervical mucus and hardening of
its outer surface (zona pellucida), to block all other sperm from
entering the egg."
(Credit : http://goaskalice.columbia.edu/why-does-it-take-millions-sperm-fertilize-egg)
"The sperm do eventually die and they are just expelled through normal secretions."
(Credit : http://ehealthforum.com/health/what-happens-to-sperm-t149890-a1.html#ixzz2dEWJRrvx)
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