NewGenIvf Group (NIVF) shares were down 21% pre-bell Wednesday, paring Tuesday's rally.
Oragenics (OGEN) stock was 15% lower, extending losses from the previous session.
Basel Medical Group (BMGL) shares were down 14%, reversing from Tuesday's gains.
Asana (ASAN) stock was 10% lower following a 3.4% increase on Tuesday.