Euan Angus Ashley is a Scottish physician, scientist, author, and founder based at Stanford University in California where he is Associate Dean in the School of Medicine and holds the Roger and Joelle Burnell Chair of Genomics and Precision Health. He is known for helping establish the field of medical genomics.

Whole genome sequencing (WGS), also known as full genome sequencing, complete genome sequencing, or entire genome sequencing, is the process of determining the entirety, or nearly the entirety, of the DNA sequence of an organism's genome at a single time. This entails sequencing all of an organism's chromosomal DNA as well as DNA contained in the mitochondria and, for plants, in the chloroplast.