Fertility in the context of Trimorphic

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 their reproductive life.

As of 2023, the total fertility rate varied widely across the world, from 0.7 in South Korea, to 6.1 in Niger. Among sovereign countries that were not city states or microstates, in 2024 the following countries had a TFR of 1.0 or lower: South Korea, Taiwan, Thailand and Ukraine; the following countries had a TFR of 1.2 or lower: Argentina, Belarus, Chile, China, Colombia, Costa Rica, Estonia, Italy, Japan, Lithuania, Poland, Spain, and Uruguay.

Venus (/ˈviːnəs/; Classical Latin: [ˈwɛnʊs]) is a Roman goddess whose functions encompass love, beauty, desire, sex, fertility, prosperity, and victory. In Roman mythology, she was the ancestor of the Roman people through her son, Aeneas, who survived the fall of Troy and fled to Italy. Julius Caesar claimed her as his ancestor. Venus was central to many religious festivals, and was revered in Roman religion under numerous cult titles.

The Romans adapted the myths and iconography of her Greek counterpart Aphrodite for Roman art and Latin literature. In the later classical tradition of the West, Venus became one of the most widely referenced deities of Greco-Roman mythology as the embodiment of love and sexuality. As such, she is usually depicted nude.

Aphrodite (/ˌæfrəˈdaɪtiː/ , AF-rə-DY-tee) is an ancient Greek goddess associated with love, lust, beauty, pleasure, passion, procreation, and as her syncretised Roman counterpart Venus, desire, sex, fertility, prosperity, and victory. Aphrodite's major symbols include seashells, myrtles, roses, doves, sparrows, and swans. The cult of Aphrodite was largely derived from that of the Phoenician goddess Astarte, a cognate of the East Semitic goddess Ishtar, whose cult was based on the Sumerian cult of Inanna. Aphrodite's main cult centers were Cythera, Cyprus, Corinth, and Athens. Her main festival was the Aphrodisia, which was celebrated annually in midsummer. In Laconia, Aphrodite was worshipped as a warrior goddess. She was also the patron goddess of prostitutes, an association which led early scholars to propose the concept of sacred prostitution in Greco-Roman culture, an idea which is now generally seen as erroneous.

A major goddess in the Greek pantheon, Aphrodite featured prominently in ancient Greek literature. According to many sources, like Homer's Iliad and Sappho's Ode to Aphrodite, she is the daughter of Zeus and Dione. In Hesiod's Theogony, however, Aphrodite is born off the coast of Cythera from the foam (ἀφρός, aphrós) produced by Uranus's genitals, which his son Cronus had severed and thrown into the sea. In his Symposium, Plato asserts that these two origins actually belong to separate entities; Aphrodite Urania (a transcendent "Heavenly" Aphrodite, who "partakes not of the female but only of the male", with Plato describing her as inspiring love between men, but having nothing to do with the love of women) and Aphrodite Pandemos (Aphrodite common to "all the people" who Plato described as "wanton", to contrast her with the virginal Aphrodite Urania, who did not engage in sexual acts at all. Pandemos inspired love between men and women, unlike her older counterpart). The epithet Aphrodite Areia (the "Warlike") reveals her contrasting nature in ancient Greek religion. Aphrodite had many other epithets, each emphasizing a different aspect of the same goddess or used by a different local cult. Thus she was also known as Cytherea (Lady of Cythera) and Cypris (Lady of Cyprus), because both locations claimed to be the place of her birth. Sappho's Ode to Aphrodite is one of the earliest poems dedicated to the goddess and survives from the Archaic period nearly complete.

Dewi Sri or Shridevi (Javanese: ꦢꦺꦮꦶꦱꦿꦶ, Balinese: ᬤᬾᬯᬶᬲ᭄ᬭᬶ, Dewi Sri, Sundanese: ᮑᮄ ᮕᮧᮠᮎᮤ ᮞᮀᮠᮡᮀ ᮃᮞᮢᮤ, Nyai Pohaci Sanghyang Asri) is the Javanese, Sundanese, and Balinese Hindu Goddess of rice and fertility, still widely worshiped on the islands of Java, Bali and Lombok, Indonesia. She is often associated or equated with the Hindu goddess Lakshmi, the shakti (consort) of Vishnu.

Sacred dance is the use of dance in religious ceremonies and rituals, present in most religions throughout history and prehistory. Its connection with the human body and fertility has caused it to be forbidden by some religions; for example, some branches of Christianity and Islam have prohibited dancing. Dance has formed a major element of worship in Hindu temples, with strictly formalized styles such as Bharatanatyam, which require skilled dancers and temple musicians. In the 20th century, sacred dance has been revived by choreographers such as Bernhard Wosien as a means of developing community spirit.

Demographic transition is a phenomenon and theory in the social sciences (especially demography) referring to the historical shift from high to low rates of birth and death, as societies attain several attributes: more technology, education (especially for women), and economic development. The demographic transition has occurred in most of the world over the past two centuries, bringing the unprecedented population growth of the post-Malthusian period, and then reducing birth rates and population growth significantly in all regions of the world. The demographic transition strengthens the economic growth process through three changes: reduced dilution of capital and land stock; increased investment in human capital; and increased size of the labor force relative to the total population, along with a changed distribution of population age. Although this shift has occurred in many industrialized countries, the theory and model are often imprecise when applied to individual countries, because of specific social, political, and economic factors that affect particular populations.

Nevertheless, the existence of some type of demographic transition is widely accepted because of the well-established historical correlation between two factors: dropping fertility rates, and social and economic development. Scholars debate whether industrialization and higher incomes lead to lower population, or vice versa. Scholars also debate to what extent various proposed and sometimes interrelated factors are involved—factors such as higher per capita income, lower mortality, old-age security, and increased demand for human capital. Human capital gradually increased during the second stage of the Industrial Revolution, which coincided with the demographic transition. The increasing role of human capital in the production process led families to invest this capital in children, which may have been the beginning of the demographic transition.

Osiris (/oʊˈsaɪrɪs/, from Egyptian wsjr) was the god of fertility, agriculture, the afterlife, the dead, resurrection, life, and vegetation in ancient Egyptian religion. He was classically depicted as a green-skinned deity with a pharaoh's beard, partially mummy-wrapped at the legs, wearing a distinctive atef crown and holding a symbolic crook and flail. He was one of the first to be associated with the mummy wrap. When his brother Seth cut him to pieces after killing him, with her sister Nephthys, Osiris's sister-wife, Isis, searched Egypt to find each part of Osiris. She collected all but one – Osiris's genitalia. She then wrapped his body up, enabling him to return to life. Osiris was widely worshipped until the decline of ancient Egyptian religion during the rise of Christianity in the Roman Empire.

Osiris was at times considered the eldest son of the earth god Geb and the sky goddess Nut, as well as brother and husband of Isis, and brother of Set, Nephthys, and Horus the Elder, with Horus the Younger being considered his posthumously begotten son. Through syncretism with Iah, he was also a god of the Moon.

In Ancient Greece a thyrsus (/ˈθɜːrsəs/) or thyrsos (/ˈθɜːrsɒs/; Ancient Greek: θύρσος) was a wand or staff of giant fennel (Ferula communis) covered with ivy vines and leaves, sometimes wound with taeniae and topped with a pine cone, artichoke, fennel, or by a bunch of vine-leaves and grapes or ivy-leaves and berries, carried during Hellenic festivals and religious ceremonies. The thyrsus is typically associated with the Greek god Dionysus (and his subsequent Roman equivalent Bacchus) as a symbol of prosperity, fertility, and hedonism.

The dithyramb (/ˈdɪθɪræm/; Ancient Greek: διθύραμβος, dithyrambos) was an ancient Greek hymn sung and danced in honor of Dionysus, the god of wine and fertility; the term was also used as an epithet of the god. Plato, in The Laws, while discussing various kinds of music mentions "the birth of Dionysos, called, I think, the dithyramb." Plato also remarks in the Republic that dithyrambs are the clearest example of poetry in which the poet is the only speaker.

However, in The Apology Socrates went to the dithyrambic poetswith some of their own most elaborate passages, asking their meaning, but got a response of, "Will you believe me?" which "showed me in an instant that not by wisdom do poets write poetry, but by a sort of genius and inspiration; they are like diviners or soothsayers who also say many fine things, but do not understand the meaning of them."

A fertility deity is a god or goddess associated with fertility, sex, pregnancy, childbirth, and crops. In some cases these deities are directly associated with these experiences; in others they are more abstract symbols. Fertility rites may accompany their worship. The following is a list of fertility deities.

Income and fertility is the association between monetary gain on one hand, and the tendency to produce offspring on the other. There is generally an inverse correlation between income and the total fertility rate within and between nations. The higher the degree of education and GDP per capita of a human population, subpopulation or social stratum, the fewer children are born in any developed country. In a 1974 United Nations population conference in Bucharest, Karan Singh, a former minister of population in India, illustrated this trend by stating "Development is the best contraceptive." In 2015, this thesis was supported by Vogl, T.S., who concluded that increasing the cumulative educational attainment of a generation of parents was by far the most important predictor of the inverse correlation between income and fertility based on a sample of 48 developing countries.

Generally a developed country has a lower fertility rate while a less economically developed country has a higher fertility rate. For example the total fertility rate for Japan, a developed country with per capita GDP of US$32,600 in 2009, was 1.22 children born per woman. But total fertility rate in Ethiopia, with a per capita GDP of $900 in 2009, was 6.17 children born per woman.

Soil conservation is the prevention of loss of the topmost layer of the soil from erosion or prevention of reduced fertility caused by over usage, acidification, salinization or other chemical soil contamination.

Slash-and-burn and other unsustainable methods of subsistence farming are practiced in some lesser developed areas. A consequence of deforestation is typically large-scale erosion, loss of soil nutrients and sometimes total desertification. Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks, affect both erosion and fertility. When plants die, they decay and become part of the soil. Code 330 defines standard methods recommended by the U.S. Natural Resources Conservation Service. Farmers have practiced soil conservation for millennia. In Europe, policies such as the Common Agricultural Policy are targeting the application of best management practices such as reduced tillage, winter cover crops, plant residues and grass margins in order to better address soil conservation. Political and economic action is further required to solve the erosion problem. A simple governance hurdle concerns how we value the land and this can be changed by cultural adaptation. Soil carbon is a carbon sink, playing a role in climate change mitigation.

The United Nations World Population Prospects (WPP) is the official series of global population estimates and projections produced by the Population Division of United Nations Department of Economic and Social Affairs (UNDESA). Each new revision presents updated data on population size by country and region, covering past estimates (from 1950 onward) and future forecasts (typically through 2100). For example, the 2024 Revision – the 28th edition since the first 1951 projection – reports annual population counts up to 2023 for 237 countries and territories, drawing on over 1,900 national censuses (1950–2023) and thousands of surveys, and generates multi-variant projections (medium, low, high, etc.) into the future. These data include age‐ and sex‐specific breakdowns of fertility, mortality and migration, allowing calculation of detailed demographic indicators. Statistics from the WPP are often cited in academia and by the media.

In biology, infertility is the inability of a male and female organism to reproduce. It is usually not the natural state of a healthy organism that has reached sexual maturity, so children who have not undergone puberty, which is the body's start of reproductive capacity, are excluded. It is also a normal state in women after menopause.

In humans, infertility is defined as the inability to become pregnant after at least one year of unprotected and regular sexual intercourse involving a male and female partner. There are many causes of infertility, including some that medical intervention can treat. Estimates from 1997 suggest that worldwide about five percent of all heterosexual couples have an unresolved problem with infertility. That figure has been on the rise, with the World Health Organization (WHO) reporting in 2023 that about 17.5% of people experience infertility during their lifetime, while prevalence at a given time point is 12.6%. Many more couples, however, experience involuntary childlessness for at least one year, with estimates ranging from 12% to 28%.

A kantharos (/ˈkænθəˌrɒs/; Ancient Greek: κάνθαρος) or cantharus (/ˈkænθərəs/) is a type of ancient Greek cup used for drinking. Although almost all surviving examples are in Greek pottery, the shape, like many Greek vessel types, probably originates in metalwork. In its iconic "Type A" form, it is characterized by its deep bowl, tall pedestal foot, and pair of high-swung handles which extend above the lip of the pot. The Greek words kotylos (κότῦλος, masculine) and kotyle (κοτύλη, feminine) are other ancient names for this same shape.

The kantharos is a cup used to hold wine, probably both for drinking and for ritual use in libations and offerings. The kantharos seems to be an attribute of Dionysus, the god of wine, who was associated with vegetation and fertility.

Fecundity is defined in two ways; in human demography, it is the potential for reproduction of a recorded population as opposed to a sole organism, while in population biology, it is considered similar to fertility, the capability to produce offspring, measured by the number of gametes (eggs), seed set, or asexual propagules.