What is antenatal testing?

Some tests, such as amniocentisis, carry a small risk of a miscarriage or other complications that could harm the mother or baby.

Testing a specific part of a system or even a program. That would be called a component. So it is component testing.

testing is a stage where the programmer can detect or check any errors in his/her program had made. its main purpose is to look for errors and not only to see if the program is working correctly.

It is testing of "how" the system works. Non functional testing may be performed at all test levels. The term non-functional testing describes the tests required to measure characteristics of systems...

Testing is making sure something works rihgt. Software testing is making sure software works right.