1 The cost of a ventless gas fireplace is $500 to $2,500, and while there are additional installation costs, you may pay extra for finish work (such as a mantle, marble surround, etc.).2  Some top-of-the-line gas fireplaces may cost as much as $5,000 to $10,000 or more. 3  A gas log kit might cost $750 to $1,000 installed. Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. 2  Direct-vent gas fireplaces cost $1,000 to $3,500, plus $500 to $1,000 for installation.
Sperm can be affected by lifestyle factors such as smoking, drinking alcohol and taking drugs. There are other lifestyle factors that you may not be aware of, and they're also explained here. The good news is, once you become aware of them, they are fairly easy to avoid. It may be.
Then the Follicle Stimulating Hormone (FSH) maintains and stimulates the process of sperm production. Testosterone which is produced in the Leydig cells of the testicles becomes responsible for the maturation of the sperm while the production goes on. How the Hormones Control Sperm Production. 1  The whole process of sperm control begins with the pituitary gland which is a very tiny gland at the base section of the brain. 2  During puberty stage, the level of the LH and the FSH rise very well thereby leading to the maturity and growth of the testes.