When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Age and female fertility - Wikipedia

   en.wikipedia.org/wiki/Age_and_female_fertility

   Female fertility is affected by age and is a major fertility factor for women. A woman's fertility is in generally good quality from the late teens to early thirties, although it declines gradually over time. [1] Around 35, fertility is noted to decline at a more rapid rate. [1]

3. Female infertility - Wikipedia

   en.wikipedia.org/wiki/Female_infertility

   A woman's fertility is affected by her age. The average age of a girl's first period is 12–13 (12.5 years in the United States, [4] 12.72 in Canada, [5] 12.9 in the UK [6]), but, in postmenarchal girls, about 80% of the cycles are anovulatory in the first year after menarche, 50% in the third and 10% in the sixth year. [7]

4. List of countries by total fertility rate - Wikipedia

   en.wikipedia.org/wiki/List_of_countries_by_total...

   Replacement fertility is the total fertility rate at which women give birth to enough babies to sustain population levels, assuming that mortality rates remain constant and net migration is zero. [10] If replacement level fertility is sustained over a sufficiently long period, each generation will exactly replace itself. [10]

5. Fertility experts say that getting pregnant after age 45 is ...

   www.aol.com/lifestyle/fertility-experts-getting...

   While the government agency didn't share numbers beyond age 44, the data show that fertility rates rapidly increased in women in the 40 to 44 age group. In 1990, the fertility rate in this group ...

6. Gross reproduction rate - Wikipedia

   en.wikipedia.org/wiki/Gross_reproduction_rate

   The gross reproduction rate (GRR) is the average number of daughters a woman would have if she survived all of her childbearing years, which is roughly to the age of 45, subject to the age-specific fertility rate and sex ratio at birth throughout that period. This rate is a measure of replacement fertility if mortality is not in the equation. [1]

7. The fertility window: are we lying to women about their ... - AOL

   www.aol.com/fertility-window-lying-women...

   It’s not that women don’t have enough eggs as they get older – only around 300-400 are released over a lifetime out of the 300,000 they have by the age of puberty – but that the fewer eggs ...

8. Total fertility rate - Wikipedia

   en.wikipedia.org/wiki/Total_fertility_rate

   A 2023 map of countries by fertility rate. Blue indicates negative fertility rates. Red indicates positive rates. The total fertility rate (TFR) of a population is the average number of children that are born to a woman over her lifetime, if they were to experience the exact current age-specific fertility rates (ASFRs) through their lifetime, and they were to live from birth until the end of ...

9. Fertility is falling and populations are tapering, U.N ... - AOL

   www.aol.com/news/five-charts-maps-show-important...

   As life expectancies increase and fertility rates decrease, the world’s population will grow older. Projections show that those 65 and older will outnumber children younger than 18 by 2080.