The crossword solution for the term 'Narrowly Bests' is NIPS, which stands for Non-Invasive Pre-natal Screening. This is a type of medical test that is used to detect genetic abnormalities in unborn babies. It is done by taking a sample of the mother's blood and analyzing it for certain markers that indicate the presence of certain conditions. The test is usually done during the second trimester of pregnancy and can help identify potential health risks before birth.