Initialism for fasting blood sugar

• Blood glucose measured after fasting

Initialism for fetal bovine serum

• Cell culture supplement from calf blood

Initialism for fetal blood sampling

• Prenatal procedure to obtain fetal blood

Initialism for Football Bowl Subdivision

• NCAA Division I top football level

Initialism for failed back syndrome

• Chronic pain after spine surgery

Initialism for father's brother's son

• Patrilateral male cousin in kinship studies