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.
Before having unprotected sex, you'll need to wait several months or longer and ejaculate 15 to 20 times or more to clear any sperm from your semen. Most doctors do a follow-up semen analysis six to 12 weeks after surgery to be certain that no sperm are present. You'll need to give your doctor sperm samples to examine. To produce a sperm sample, your doctor will have you masturbate and ejaculate into a container or use a special condom to collect semen during intercourse.