Genetic rickets is a term used for definition of wide range of diseases caused by genetic changes with symptoms similar to nutritional vitamin D deficient rickets. The etiology and pathogenesis somehow is different as genetic rickets can develop despite adequate intake of vitamin D and normal sun exposure. Hence, the diagnostics and therapy also differ a lot from of a nutritional rickets and require medical-genetic counseling, which includes not only management of a patient but also counseling the family for better planning of further child birth tactics.