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.
A man should not âstore upâ his semen for a long time because sperm in the vas deferens slowly die. If a man doesnât ejaculate for 4-5 days, his semen will contain more dead sperm than normal. On the other hand if he has ejaculated one or more times in the past two days, his semen volume will be lower than normal.