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The net reproduction rate (R 0) is the number of surviving daughters per woman and an important indicator of the population's reproductive rate. If R 0 is one, the population replaces itself and would stay without any migration and emigration at a stable level.
The inverse correlation between age and female fertility in later reproductive life is argued to motivate family planning well before having reached 35 years of age. [23] Mapping of a woman's ovarian reserve , follicular dynamics and associated biomarkers can give an individual prognosis about future chances of pregnancy, facilitating an ...
The female reproductive system likewise contains two main divisions: the external genitalia (the vulva) and the internal genitalia. The ovum meets with the sperm cell : a sperm may penetrate and merge with the egg, fertilizing it with the help of certain hydrolytic enzymes present in the acrosome.
The small plant in front is about 1 cm (0.4 in) tall. The concept of "individual" is obviously stretched by this asexual reproductive process. Reproduction (or procreation or breeding) is the biological process by which new individual organisms – "offspring" – are produced from their "parent" or parents.
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 ...
WASHINGTON (Reuters) -President Joe Biden signed a new executive order on Monday that expands U.S. government research on women's health, while pledging $200 million next year to better understand ...
The male reproductive system includes testes, rete testis, efferent ductules, epididymis, sex accessory glands, sex accessory ducts and external genitalia. [3]Testosterone, an androgen, although present in both males and females, is relatively more abundant in males.
Fertility in colloquial terms refers the ability to have offspring.In demographic contexts, fertility refers to the actual production of offspring, rather than the physical capability to reproduce, which is termed fecundity.