Answer from: Sergio Gonzalez, MSc
We can differentiate between two different types of features: genetic (genotype) and physical (phenotype). Regarding the genetic type, it can be measured in the lab. They could be taken into account when choosing a donor, using a karyotype test. The physical characteristics of a person is called phenotype and it involves eye colour, hair colour, ethnicity, hair type, body type, etc., anything that you can see in a photo and use to compare a person to another person. The embryologists and doctors usually measure these phenotypic issues (like hair colour, eye colour) with different donors so they can get the biggest similarity to the patient. Fenomatch measures this kind of features based on photos of the donor and patient and gives scientific arguments for the decision to choose the donor.
What is a phenotype? What should I know about it when choosing a donor?
What are phenotype and genotype? Which should we take into consideration when selecting an egg/sperm donor for IVF treatment?