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Healthy Manhattan: When Men Are Infertile
Male infertility is not as easy to recognize as female infertility. For a male to get his partner pregnant, he must produce healthy sperm that can reach, penetrate and fertilize the egg, but several other factors are involved. The sperm must be healthy, which requires functioning testicles, and there must be enough hormones to maintain sperm production. The sperm has to be carried into the semen and there needs to be enough sperm in the semen to increase the odds of fertilization. The sperm must be shaped correctly and be able to move for penetration of the egg. If one of these factors is off, fertilization won't take place.