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| demographyfertility | |
| demography | |
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Human fertility depends on factors of Nutrition , Sexual Behavior , Culture , Instinct , Endocrinology , timing, Economics , way of life, and Emotion s. Animal fertility is no less complex, and may display astounding mechanisms. AGRICULTURE See also Arable Land , Soil Fertility , Harvest , Neolithic Revolution . Fertility is also applied to Farmland s and plants, where it implies a capacity to yield large crops of sound Fruits , Seeds or Vegetables . DEMOGRAPHICS The Fertility Rate is a Demographic measure of the number of Children per woman. Although it has been until recently considered to be a fairly reliable indicator of Population growth, it is no longer so in much of Asia . Due to Selective Abortion and other factors, the ratio of women relative to men in populations is declining. Therefore, the fertility rate as it has traditionally been defined is no longer an authoritative measure of population growth in China , India , and Myanmar . HUMAN FERTILITY Both women and men have Hormonal cycles which determine both when a woman can achieve Pregnancy and when a man is most fertile. The female cycle is approximately twenty-eight days long, but the male cycle is variable. Men can ejaculate and produce Sperm at any time of the month, but their Sperm Quality dips occasionally, which scientists guess is in relation to their internal cycle. Furthermore, age also plays a role, especially for women. Menstrual cycle See Also: Menstrual cycle#The fertile window Women are fertile only about seven days in each Menstrual Cycle . Ovulation occurs at about the fourteenth day of their Menstrual Cycle , this obviously being the most fertile time for females. The exact point of ovulation depends, however Ovusoft.com . If the egg is not fertilized by the male’s sperm, the egg will break down within 1–2 days into its components (mostly protein) and be reabsorbed by the body. However, sperm can survive inside the uterus for five days. Thus, a successful conception can result during seven days of the female cycle; five days before and two days after ovulation. Female fertility after 30 Women's fertility peaks in their early teens, and often deteriorates after 30. Of women trying to get pregnant, without using fertility drugs or In Vitro Fertilization :
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