Fertilization is the moment an egg and sperm join to create a new life. For this to happen, sex between a male and female must have taken place and the male deposited sperm in the female vaginal tract, the sperm must then overcome the acidic environment of the vagina and enter her cervix where it is safe from the vaginal acid that kills sperm, a female orgasm can greatly speed up this process. Once the sperm swim to the fallopian tubes they live up to 7 days waiting for an egg to arrive with ovulation.

The fertilized egg then moves down the fallopian tubes to the uterus where it will implant it's self to begin pregnancy, on this journey the cells will divide but if something goes wrong, it is passed with the following period, only one in four fertilized eggs will make it to a full term pregnancy.

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