An introduction to human fertilisation and the challenges facing the sperm and egg. How do they find each other and how do they combine to form a new life?
- When an egg is released from the ovary, it travels down the fallopian tube to await the sperm.
- Before sperm can enter an egg, it must become hyperactivated.
- Once a sperm has entered, the egg hardens to prevent other sperm from getting in.
- Inside a fertilised egg, genetic information gathers to form a zygote.