Definition, Meaning & Synonyms | English word OVUM

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Definitions of OVUM

1. (cytology) The female gamete in animals; the egg cell.

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Examples of Using OVUM in a Sentence

• A spermatozoon is a moving form of the haploid cell that is the male gamete that joins with an ovum to form a zygote.
• The process involves monitoring and stimulating a woman's ovulatory process, then removing an ovum or ova (egg or eggs) from her ovaries and enabling a man's sperm to fertilise them in a culture medium in a laboratory.
• A woman may be considered a mother by virtue of having given birth, by raising a child who may or may not be her biological offspring, or by supplying her ovum for fertilisation in the case of gestational surrogacy.
• To create the in-vitro rabbit offspring, Pincus removed the ovum from the mother rabbit and placed it in a solution mixture of saline and estrone.
• The ancient world did not possess a thoroughly modern understanding that male semen and female ovum were both needed to form an embryo; this cultural milieu was conducive to miraculous birth stories, and tales of virgin birth and the impregnation of mortal women by deities were well known in the 1st-century Greco-Roman world and Second Temple Jewish works.
• Genetic sex differences start at conception depending on whether an ovum fuses with a sperm cell carrying an X or a Y chromosome.
• As it was a dizygotic pregnancy, she miscarried the identical twins during the third month and Falco, who was conceived via a separate ovum, survived.
• The egg cell or ovum (: ova) is the female reproductive cell, or gamete, in most anisogamous organisms (organisms that reproduce sexually with a larger, female gamete and a smaller, male one).
• An archegonium (: archegonia), from the Ancient Greek ἀρχή ("beginning") and γόνος ("offspring"), is a multicellular structure or organ of the gametophyte phase of certain plants, producing and containing the ovum or female gamete.
• Due to the fact that placental mammals and marsupials nourish their developing embryos via the placenta, the ovum in these species does not contain significant amounts of yolk, and the yolk sac in the embryo is relatively small in size, in comparison with both the size of the embryo itself and the size of yolk sac in embryos of comparable developmental age from lower chordates.
• Inverse parthenogenesis is a baffled scientist's explanation for the existence of an entirely unexpected ovum in Murray Katz's latest sperm bank donation: unexpected because, as Murray himself admits, he does not know many women.
• A woman ovulates at only one time during her cycle, and an unfertilised ovum can survive for only 12–24 hours.
• Louise Bourgeois Boursier publishes Diverse Observations on Sterility; Loss of the Ovum after Fecundation, Fecundity and Childbirth; Diseases of Women and of Newborn Infants in Paris, the first book on obstetrics written by a woman.
• Canine sperm can live for 10 to 11 days in the fallopian tubes so if a female is bred 10 days before the oocytes (ovum) can be fertilized, she will appear to have a gestation length of 70 days.
• It is the remains of the ovarian follicle that has released a mature ovum during a previous ovulation.
• While it was commonly believed at the time that the female reproductive cycle was controlled by substance in the corpus luteum, Allen sought the answer in the follicles surrounding the ovum, leading to his discovery of estrogen, though it was identified six years later by Adolf Butenandt in 1929.
• Oogenesis consists of several sub-processes: oocytogenesis, ootidogenesis, and finally maturation to form an ovum (oogenesis proper).
• There is a laterality preference based on the specific oviduct and ovary used for ovulation; when only a single ovum is ovulated there is a pressure for the right ovary to overproduce a larger number of mature ova.
• During the menstrual cycle, the ovaries release an ovum, which transits through the fallopian tube into the uterus.
• Although, final costs have yet to be determined, the network is expected to compete with the NBN, leading to calls from the research director of Ovum, David Kennedy, for NBN Co to respond competitively.

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