Difference Between Internal and External Fertilisation

Here is the table of comparison for internal and external fertilisation taken from this website.
http://www.bgetutor.com/Library/C33.html

	Internal Fertilisation	External Fertilisation
What is it?	Sperm meets the egg while the egg is still inside the female body	Sperm (male) meets the egg (female) while the egg is outside the female body
Conditions?	Need to have protection for the developing egg	Usually happens in wet environment. Male and female releases their gametes (cells for reproduction) into their surrounding
Advantages?	Protection for the embryo ( the developing young) as it develops within the mother	Usually result in production of large number of offspring
Disadvantages?	Limited number of young	The presence of predators reduces the survival of the eggs
Who?	Mostly reptiles and mammals	Mostly amphibians and fish. However, not for fish like guppies that give birth.

And also, hens lay eggs every day, regardless if they have been fertilised or not by the rooster (male). So in the case where there is no rooster around, hens will STILL lay eggs, just that the eggs will not turn into chicks, but are found in your supermarkets! :)

Love,
Miss Loh