Hallo! Her er svaret ditt på dette spørsmålet! ☺
Answer: This means that the Gametes (Sperm and Egg) are being released EXTERNALLY and the fusion is to form the brand new embryo occurs externally (which is outside of the mother's body). This contrasts everything with 'internal fertilization'. In addition, this also means that this method is used by most mammals all around the world.
Hope this helps you out! ☺
