Role of ShengJingSan in treatment of Asthenospermia via activation of sperm-specific catsper ion channel

INTERVENTION: 1:administration Sheng Jing San;2:administration Levocarnitine;3:administration placebo; CONDITION: Asthenospermia PRIMARY OUTCOME: sperm concentration;Sperm motility;Sperm morphology;Seminal plasma biochemistry;The expression of the CatSper channel protein; INCLUSION CRITERIA: 1. Conforming to the diagnosis of traditional Chinese Medicine of male sterility and diagnosis standard of western medicine of weak sperm; 2. Age from 20 to 40; 3. Whose main reason of male sterility is weak sperm; 4. Medical history over one year; 5. Those who are informed.