Who knows?: Known to many, some 10-15 % of couples can not get pregnancy under unprotected sex, and in 50% of couples, the problems come from females; 30 %, from males; and 20%, from both males and females. Semen volume may vary and is usually about 1.4-4.5 cc. As far as the quality of semen is concerned, the sperm count, maturity, and forward motility are the major significant factors for fertility.
Answered 5/24/2018
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