Micro Array, PGS or a-CGH is another method of chromosome screening. However it is better than PGD as Micro Array can detect all 23 pairs of chromosome. The embryologist can see which chromosome is normal or abnormal. Due to Micro Array, we can screen and find the healthiest embryos for your family. Also we can know the gender of embryos. It works by detecting small amounts of missing or extra genetic material (DNA).Microarray is able to detect small copy number variants that were not detectable by previous methods such as PGD.