The Nuchal Translucency (NT) scan is a prenatal screening test that measures the thickness of fluid at the back of the baby's neck. This measurement, known as nuchal translucency thickness, can help assess the risk for certain chromosomal abnormalities, such as Down syndrome. In general, a NT measurement below 3.5mm is considered normal. However, it's important to note that NT measurements alone cannot provide a definitive diagnosis. They are typically used in conjunction with other tests and factors to determine overall risk. If your NT measurement is 3.6mm, it falls slightly above the normal range but does not necessarily indicate a problem on its own. Your healthcare provider will consider various factors, including your age and any additional test results, to provide a more accurate assessment of your baby's health. It's always best to consult with your healthcare provider for further guidance and interpretation of your specific situation.