Why are certain babies called test tube babies?

Answer 1

Some babys are called Test Tube Babies because they are made in a lab if a female wants a baby but can't actully HAVE one. See this link to Louise Brown the Worlds first test tube baby http://en.wikipedia.org/wiki/Louise_Brown

Answer 2

In vitro is Latin for "inside a glass". Basically, that's a fancy way of saying "in a test tube".

Answer 3

To remove the process of a baby being born through the natural way of the vaginal system.