Would you believe that every individual is a champion swimmer? Maybe you will be asking how? But the naked truth is we once won the first place in a certain race and now we grow and live. Each of us was product of two different cells which unite to begin a new life.
Human reproduction takes place as internal fertilization by sexual intercourse. During this process, the erect penis of the male is inserted into the female's vagina until the male ejaculates semen, which contains sperm. This process is also known as "coitus", "mating" or "having sex". (Wikipedia) The sperm travels through the vagina and cervix into the uterus or Fallopian tubes for fertilization of the ovum. This is how the race happens where in approximately five millions of sperms will swim like millions of runners in a marathon but only one will reach the finish line which is a sperm that will unites with an egg cell from the female’s fallopian tube. Upon fertilization and implantation gestation of the fetus then occurs within the female's uterus.
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