It is important to know the reproductive habits of insects. Butterfly eggs are fertilized inside the body of the butterfly.
Because, amniotic eggs contains placenta that could be only developed inside the females womb.
The male injects sperm into the female's cloaca. The eggs inside the female are fertilized by this sperm and are incubated inside the female's body until the young are ready to emerge to the outside world.
When the bearded dragons go through intercourse, the eggs are fertilized inside of the female already. So when the female lays the eggs, they are already fertilized.
Fertilization in cats typically occurs inside the female's body in the oviducts during mating. The female's eggs are fertilized by the male's sperm within the reproductive tract.
in the female
Most fish lay eggs that are externally fertilized. This means that the female fish releases her eggs into the water, where they are fertilized by the male fish's sperm. The fertilized eggs then develop outside the female's body until they hatch.
Frogs have external (outside) fertilization.
External fertilization occurs when the egg is fertilized by the sperm outside of the female's body. As when a female fish deposits her eggs on the ground and the male fish ejaculates his sperm over the eggs. Internal fertilisation occurs when the sperm fertilizes the egg inside the female's body. Which is what mammals do, including human beings.
Eggs develope inside the body before being layed. If they weren't, the "baby" would be born live. Also, eggs need incubation, meaning a male and female have to share genes before the egg gets "fertilized". If that didn't happen, there would be no egg.
Female shark's eggs are fertilized sexually inside her body by the male. Most sharks incubate the babies inside their body and give birth to live offspring; a few types of sharks deposit their fertilized eggs on the ocean floor and they're left to develop and hatch on their own. See link below for more information.
The female lays eggs, which are fertilized outside the body of the female. Goldfish do not have sexual intercourse.