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True Hermaphroditism
True hermaphroditism, sometimes referred to as ovotesticular syndrome, is an intersex condition in which an individual is born with both ovarian and testicular tissue. Commonly, one or both gonads is an ovotestis containing both types of tissue. Although it is similar in some ways to mixed gonadal dysgenesis, the conditions can be distinguished histologically. Symptoms * Gynecomastia (present in 75% of cases.) History The first medical attempts to document cases appeared in the 16th century. Up until the Late Middle Ages individuals with these conditions were viewed as monsters. Causes There are several ways in which this may occur. * It can be caused by the division of one ovum, followed by fertilization of each haploid ovum and fusion of the two zygotes early in development. * Alternately, an ovum can be fertilized by two sperm followed by trisomic rescue in one or more daughter cells. * Two ova fertilized by two sperm cells will occasionally fuse to form a tetra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intersex
Intersex people are individuals born with any of several sex characteristics including chromosome patterns, gonads, or genitals that, according to the Office of the United Nations High Commissioner for Human Rights, "do not fit typical binary notions of male or female bodies". Sex assignment at birth usually aligns with a child's anatomical sex and phenotype. The number of births with ambiguous genitals is in the range of 1:2000–1:4500 (0.022%–0.05%). Other conditions involve atypical chromosomes, gonads, or hormones. Some persons may be assigned and raised as a girl or boy but then identify with another gender later in life, while most continue to identify with their assigned sex. The number of births where the baby is intersex has been reported differently depending on who reports and which definition of intersex is used. Anne Fausto-Sterling and her co-authors suggest that the prevalence of "nondimorphic sexual development" might be as high as 1.7%. A study publis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovulation
Ovulation is the release of eggs from the ovaries. In women, this event occurs when the ovarian follicles rupture and release the secondary oocyte ovarian cells. After ovulation, during the luteal phase, the egg will be available to be fertilized by sperm. In addition, the uterine lining (endometrium) is thickened to be able to receive a fertilized egg. If no conception occurs, the uterine lining as well as the egg will be shed during menstruation. Process Ovulation occurs about midway through the menstrual cycle, after the follicular phase. The days in which a person is most fertile can be calculated based on the date of the last menstrual period and the length of a typical menstrual cycle. The few days surrounding ovulation (from approximately days 10 to 18 of a 28-day cycle), constitute the most fertile phase. The time from the beginning of the last menstrual period (LMP) until ovulation is, on average, 14.6 days, but with substantial variation among females and betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salmacis
Salmacis ( grc, Σαλμακίς) was an atypical Naiad nymph of Greek mythology. She rejected the ways of the virginal Greek goddess Artemis in favour of vanity and idleness. Mythology Ovid's version Salmacis' attempted rape of Hermaphroditus is narrated in the fourth book of Ovid's '' Metamorphoses'' (see also Dercetis). One day Hermaphroditus went swimming in his pool. Upon seeing him, Salmacis was struck with love for him, approached him and confessed her love to him; but he was not interested, and demanded she leave. She did so, but her passion took her back, unable to stay away from him. As Hermaphroditus emerged from the pool, she threw herself at him, and forcibly kissed him as he tried to escape. Salmacis then cried to the gods and begged them to let them stay together forever; and the gods answered by fusing them together for all time, into a deity that had both male and female parts. She thus becomes one with Hermaphroditus and he curses the fountain to hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nymph
A nymph ( grc, νύμφη, nýmphē, el, script=Latn, nímfi, label= Modern Greek; , ) in ancient Greek folklore is a minor female nature deity. Different from Greek goddesses, nymphs are generally regarded as personifications of nature, are typically tied to a specific place or landform, and are usually depicted as maidens. They were not necessarily immortal, but lived much longer than human beings. They are often divided into various broad subgroups, such as the Meliae (ash tree nymphs), the Dryads (oak tree nymphs), the Naiads (freshwater nymphs), the Nereids (sea nymphs), and the Oreads (mountain nymphs). Nymphs are often featured in classic works of art, literature, mythology, and fiction. Since the Middle Ages, nymphs have been sometimes popularly associated or even confused with fairies. Etymology The Greek word has the primary meaning of "young woman; bride, young wife" but is not usually associated with deities in particular. Yet the etymology of the noun rem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovid
Pūblius Ovidius Nāsō (; 20 March 43 BC – 17/18 AD), known in English as Ovid ( ), was a Roman poet who lived during the reign of Augustus. He was a contemporary of the older Virgil and Horace, with whom he is often ranked as one of the three canonical poets of Latin literature. The Imperial scholar Quintilian considered him the last of the Latin love elegists.Quint. ''Inst.'' 10.1.93 Although Ovid enjoyed enormous popularity during his lifetime, the emperor Augustus banished him to Tomis, a Dacian province on the Black Sea, where he remained a decade until his death. Overview A contemporary of the older poets Virgil and Horace, Ovid was the first major Roman poet to begin his career during Augustus's reign. Collectively, they are considered the three canonical poets of Latin literature. The Imperial scholar Quintilian described Ovid as the last of the Latin love elegists.Quint. ''Inst.'' 10.1.93 He enjoyed enormous popularity during his lifetime, but the emperor Augustu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greek Mythology
A major branch of classical mythology, Greek mythology is the body of myths originally told by the ancient Greeks, and a genre of Ancient Greek folklore. These stories concern the origin and nature of the world, the lives and activities of deities, heroes, and mythological creatures, and the origins and significance of the ancient Greeks' own cult and ritual practices. Modern scholars study the myths to shed light on the religious and political institutions of ancient Greece, and to better understand the nature of myth-making itself. The Greek myths were initially propagated in an oral-poetic tradition most likely by Minoan and Mycenaean singers starting in the 18th century BC; eventually the myths of the heroes of the Trojan War and its aftermath became part of the oral tradition of Homer's epic poems, the '' Iliad'' and the '' Odyssey''. Two poems by Homer's near contemporary Hesiod, the ''Theogony'' and the '' Works and Days'', contain accounts of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphrodite
Aphrodite ( ; grc-gre, Ἀφροδίτη, Aphrodítē; , , ) is an ancient Greek goddess associated with love, lust, beauty, pleasure, passion, and procreation. She was syncretized with the Roman goddess . Aphrodite's major symbols include 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. In Hesiod's ''Theogony'', Aphrodite is born off the coast of Cythera from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermes
Hermes (; grc-gre, wikt:Ἑρμῆς, Ἑρμῆς) is an Olympian deity in ancient Greek religion and Greek mythology, mythology. Hermes is considered the herald of the gods. He is also considered the protector of human heralds, travellers, thieves, merchants, and orators. He is able to move quickly and freely between the worlds of the mortal and the divine, aided by his winged sandals. Hermes plays the role of the psychopomp or "soul guide"—a conductor of souls into the Underworld, afterlife. In myth, Hermes functions as the emissary and messenger of the gods, and is often presented as the son of Zeus and Maia, the Pleiades (Greek mythology), Pleiad. Hermes is regarded as "the divine trickster," about which the ''Homeric Hymn, Homeric Hymn to Hermes'' offers the most well-known account. His attributes and symbols include the herma, the rooster, the tortoise, wallet, satchel or pouch, talaria (winged sandals), and winged helmet or simple petasos, as well as the palm tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermaphroditos
In Greek mythology, Hermaphroditus or Hermaphroditos (; grc, Ἑρμαφρόδιτος, Hermaphróditos, ) was a child of Aphrodite and Hermes. According to Ovid, he was born a remarkably handsome boy whom the naiad Salmacis attempted to rape and prayed to be united with forever. A god, in answer to her prayer, merged their two forms into one and transformed him into a hermaphrodite, he being considered the origin of the name. Their name is compounded of his parents' names, Hermes and Aphrodite. He was one of the Erotes. Because Hermaphroditus was a child of Hermes, and consequently a great-grandchild of Atlas (Hermes's mother Maia was the daughter of Atlas), sometimes he is called Atlantiades ( el, Ατλαντιάδης). Symbolism Hermaphroditus, the two-sexed child of Aphrodite and Hermes (Venus and Mercury) had long been a symbol of androgyny or effeminacy, and was portrayed in Greco-Roman art as a female figure with male genitals. Theophrastus's account also suggests ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermaphrodite
In reproductive biology, a hermaphrodite () is an organism that has both kinds of reproductive organs and can produce both gametes associated with male and female sexes. Many taxonomic groups of animals (mostly invertebrates) do not have separate sexes. In these groups, hermaphroditism is a normal condition, enabling a form of sexual reproduction in which either partner can act as the female or male. For example, the great majority of tunicates, pulmonate molluscs, opisthobranch, earthworms, and slugs are hermaphrodites. Hermaphroditism is also found in some fish species and to a lesser degree in other vertebrates. Most plants are also hermaphrodites. Animal species having different sexes, male and female, are called gonochoric, which is the opposite of hermaphrodite. There are also species where hermaphrodites exist alongside males (called androdioecy) or alongside females (called gynodioecy), or all three exist in the same species (called trioecy); these three syst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Female
Female ( symbol: ♀) is the sex of an organism that produces the large non-motile ova (egg cells), the type of gamete (sex cell) that fuses with the male gamete during sexual reproduction. A female has larger gametes than a male. Females and males are results of the anisogamous reproduction system, wherein gametes are of different sizes, unlike isogamy where they are the same size. The exact mechanism of female gamete evolution remains unknown. In species that have males and females, sex-determination may be based on either sex chromosomes, or environmental conditions. Most female mammals, including female humans, have two X chromosomes. Female characteristics vary between different species with some species having pronounced secondary female sex characteristics, such as the presence of pronounced mammary glands in mammals. In humans, the word ''female'' can also be used to refer to gender in the social sense of gender role or gender identity. Etymology and usage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spermatogenesis
Spermatogenesis is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis. This process starts with the mitotic division of the stem cells located close to the basement membrane of the tubules. These cells are called spermatogonial stem cells. The mitotic division of these produces two types of cells. Type A cells replenish the stem cells, and type B cells differentiate into primary spermatocytes. The primary spermatocyte divides meiotically (Meiosis I) into two secondary spermatocytes; each secondary spermatocyte divides into two equal haploid spermatids by Meiosis II. The spermatids are transformed into spermatozoa (sperm) by the process of spermiogenesis. These develop into mature spermatozoa, also known as sperm cells. Thus, the primary spermatocyte gives rise to two cells, the secondary spermatocytes, and the two secondary spermatocytes by their subdivision produce four spermatozoa and four haploid cells. Spermatozo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
