In the Garden of Eden, God commands Adam and Eve to
"Be fruitful and increase in number" Genesis 1:28 (NIV)
Later, after the Fall in Genesis 3, we're told that
"Adam made love to his wife Eve, and she became pregnant and gave birth to Cain" Genesis 4:1 (NIV)
The Bible does not tell us the time difference between these two events, or even clearly state that Cain's birth happened after the fall (although it's implied by the order it is recorded).
Do any Christian denominations or beliefs teach that Adam and Eve produced children (Cain, Abel, or others) while they were in the Garden of Eden?