those countries have very high taxes. Ã°â¢The average annual growth rate for the European population from 1985 to 1995 was only. 0.28 percent; in the same period the population of Asia grew by 1.69 percent per year, and. that of North America by 1.33 percent annually.
The life span of sperm after ejaculation depends on the circumstances. Ejaculated sperm remain viable for several days within a woman's reproductive tract or in nutritive liquid (culture medium) in a lab setting. Fertilization is possible as long as the sperm remain alive â at least five days. Sperm also can be preserved for years when semen is frozen. With. Landon Trost, M.D. 1  Secondary infertility. 2  Paternal age.
This change in the fluid allows the ejaculated sperm to stay in the vagina initially, but then swim out as the seminal fluid becomes more liquid. These enzymes quickly destroy any sperm that canât swim out of the semen within a few hours. It takes approximately 72 days for sperm to mature in the body.During the last 14 days of this process, the sperm are very much alive and swimming. They are alive a long time prior to leaving a manâs body. During freezing, sperm are cooled to a very low sub zero temperature (minus 196 degrees Centigrade).his change in the fluid allows the ejaculated sperm to stay in the vagina initially, but then swim out as the seminal fluid becomes more liquid. These enzymes quickly destroy any sperm that canât swim out of the semen within a few hours. It takes approximately 72 days for sperm to mature in the body.