Significant body fee electronic imaging is utilized for the first time to characterise the flagellar movement of migrating sperm in reduced and significant viscosities, and displays in precise spatial and temporal element waveform evolution along theFlagellum.B?i b? và t?ng c??ng th? l?c, n?n t?ng c? th? h? tr? nam gi?i có s?c kh?e t?t nh?t cho