Centronuclear Myopathy (CNM), previously known as HMLR, or Hereditary Myopathy, is an autosomal recessive mutation that causes insufficient muscle function in the Labrador Retriever breed. 

Degenerative Myelopathy (DM) - Why buy a tested dog? See video and link below.

Exercise-Induced Collapse (EIC)

Why buy a tested dog?  See video and link below.

Hereditary Nasal Parakeratosis is an inherited disease affecting the nose of Labrador Retrievers. (HNPK)

Testing - Why by a tested dog? What is Progressive Retinal Atrophy (PRA) - Dog shown also has cataracts.

What is Progressive retinal Atrophy, progressive Rod-cone degeneration (PRA-prcd) is a late onset, inherited eye disease affecting many breeds of dog.

What is rd/osd? 

Retinal Dysplasia/Oculoskeletal Dysplasia 1 (RD/OSD1)

Skeletal Dysplasia 2 is an inherited Musculoskeletal disease affecting Labrador Retrievers. (SD2)