Fertilisation (also known as fertilization and syngamy) is the process of a sperm fusing with an ovum, which eventually leads to the development of an Embryo. The whole process of development of new individuals is called procreation (act by which organisms reproduce).

Fertilization is the meeting between an egg and a spermatozoon. The egg is able to be impregnated during 24 hours from when it leaves the follicle. During a male ejaculation, there are anywhere between 60 million and 500 million spermatozoa that have a go at the 'big race'.

They cross the collar of the Uterus pretty much within ten minutes. It is for this reason that women are often advised to not get up directly after!... They cross into the Uterus at a speed of 2 to 3 millimeters per minute, then they arrive at the fertilisation point within about 2 hours. The spermatozoa next fix themselves onto a membrane that surrounds the egg and alters the shape of the acrosome at the head in order to create a drive-piling effect to try to enter the egg. Only one can get through! Once one is successful, the champion spermatozoon loses it's tail and it's head increases in size. This entrance creates an 'activation' in the egg and it too begins to enlarge. The two come closer and merge. A small zygote now exists. This will then begin to divide to hopefully produce a baby in nine months time! Fertile period: The fertile period is period around ovulation, during which if relations are kept, the chances of pregnancy are high. In order to improve the chances of pregnancy, it is important to understand how to calculate the fertile period.

Female infertility Uterine polyps Uterine fibroids Multiple pregnancy