How to use ovum in a sentence

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Sentence Examples As in most other animals, the sperm mitochondria penetrate the cell membrane of the ovum at fertilization. On the 1st December I bred also from another ovum a small hymenopterous parasite. If fertilization occurs, progesterone supports implantation of the ovum and maintains the pregnancy. We rather think of the latter as a new form of life to whose nature both the ovum and the spermatozoon have made significant contributions. When a human sperm fertilizes a human ovum, a single cell is created with the potential to grow into a human person. The fertilised ovum was then implanted in the womb of the surrogate mother. The earliest stage of a stem cell in the development of the organism is the fertilised ovum. Non Mendelian disorders have patterns of inheritance which do not conform to Mendel's Law of Segregation where each ovum or sperm receives only one copy of a pair of genes. Lack of progesterone is especially instrumental in expelling the fertilized ovum and it results in an abortion. It is therefore important to verify that the ovum is located inside the uterus and to perform twice monthly checks of the cervix. They produce estrogen and begin to ripen an ovum in response to FSH from the anterior pituitary gland. In 1968, the same year Edwards's partnership with Steptoe began, he succeeded in fertilizing a human ovum outside the womb. In addition, NORPLANT® Implants cause the lining of the uterus to become less rich in blood vessels and unprepared for an ovum to implant. The dominant follicle will go on to break open and release an ovum at ovulation. Human life is a continuum and that continuum begins at the moment the ovum is fertilized by the spermatozoa. In some cases, though, the unfertilised ovum itself is believed to be affected. Nuclear transfer is most common and involves enucleating an ovum, or egg, with all the genetic material removed. When an adult cell is injected or combined with an ovum which has previously been stripped of its chromosomes, the ovum wipes out the programming of all of the cell's genes. Some people believe that it begins with the fusion of a spermatozoon with an ovum, yet each spermatozoon is alive, even though billions of them move around in vain. Access is via a two-flight stairway up to the entrance door which is topped by an entablature with an ovum, above which the pediment is broken by a sundial. Show More Sentences For example, the birth of Dolly the sheep, the first animal to be cloned by nuclear transfer based on an adult cell line, highlighted the extraordinary reprogramming ability of a mammal's ovum. Is it permissible for the nucleus of an ovum of mine, combined with a skin cell, to serve at some point in the future to make a heart cell for me? Functional sterility may not be due to ovulatory failure but to corpus luteum development and function which is inadequate for proper implantation and early development of the fertilized ovum. Science has recently discovered that only one single spermatozoon that penetrates the ovum is required for fertilization, out of the several million produced by man. Edwards had undertaken laparoscopic surgery for picking up ovum and also did not adopt the superovulation technique. On the surface, the ovum sensor appears morally unproblematic, if not a moral boon. The haploid ovum is now called an ootid. The second polar body degenerates, sometimes dividing before it dies. This system quantum proceeds to the end with the fusion of nucleus of spermatozoid and ovum and with formation of a zygote. The corpus luteum secretes hormones that prepare the uterus for a possible pregnancy in the event the ovulated ovum was fertilized. Researchers from the academy are working on a robot that can choose which sperm cell has the best morphological characteristics and insert it directly into the ovum cell. Two weeks after it has begun to mature, a single ovum will burst out of its skin, float through a spaghetti-sized tube, plant itself in the uterus, and wait. The first abortion was four months from pregnancy resulting in a fetus with anencephaly, kyphosis and cephalocele and the second was a blighted ovum at 3rd month of pregnancy. The spermatozoon is not concerned with evasion, but in addition to the ordinary physical and chemical changes it has a special attractional relation to the ovum. Parthenogenesis occurs when an egg or ovum fuses with a cell called a sister polar body, a byproduct of ova production, rather than with male sperm, to promote cell division. Chimerism could also be caused by fusion of the polar body and an ovum, double fertilization, fusion of two nuclei or as a result of hidden mosaicism with a Y cell line. Examples from Classical Literature And as the rose springs from the seed, so the horse develops from the ovum. The very young follicles consist of but a single layer of follicular cells surrounding the ovum, which lies centrally. Reichert and hensen regard it as an outgrowth of the uterine wall, while the body within its free apex is regarded as the ovum. There is no identity of matter between me as I now am, and me as an impregnate ovum. But the ovum, the cell derived from the mother, may carry either femaleness or maleness. Often the unfertilized ovum is carried away with it, but the two things do not necessarily happen at the same time. The two membranes, the liquor amnii, and the inclosed ovum, are called the ovulum! One is an ovum, and these are the principle the mother gives to the future child. Of what sort must the chosen diet be which can favor the ripening of the ovum? Having described the maternal membranes of the ovum, we come now to the membranes which form the parietes of the ovum. The first change the zygote undergoes in all animals is what is generally called the segmentation or cleavage of the ovum. The storehouse for the seeds they call the 'ovary,' from the Latin ovum, an egg. The vesicle corresponds to the vesicle, or germinal spot, in the eggs of birds, and ovum of mammiferous animals. In most existing Teleostei, the ovum has become again reduced in size, but the meroblastic segmentation has been preserved. Now, an indispensable condition of the ripening of the ovum in the female organism is that the metabolic process shall be normal. Now, the human ovum or egg consists of a vitellus or yolk, which is covered by a similar membrane, known as the vitelline. Foulis regards the zona pellucida as a product of the ovum and not of the follicle. The result of this is that half the number of chromosomes in the ovum are lost. Then commonly the entire ovum comes away with the gauze, or what remains of it is taken out with a curette. This ovum, though probably not more than thirteen days old, was completely enclosed by a decidua reflexa. Show More Sentences In this layer nuclei appear, which are equivalent to those in the elasmobranch ovum. This difference no doubt depends upon the greater quantity of yolk particles present in the elasmobranch ovum. I will now pass on to consider the embryogeny of the Metazoa, beginning at its earliest stage in the fertilization of the ovum. The ovum on leaving the ovary is received by the fimbriated extremity of the fallopian tube, down which it slowly travels. An ovum becomes mature, breaks through its Graafian follicle in the ovary and is set free. Oviparous, with a large-yolked and meroblastic ovum, enclosed within a follicle of two rows of cells. The follicular cells gradually increase in number until the ovum lies in the midst of several layers of cells. The cervix is then more or less dilated and the ovum is palpable. Is any part of it present in the ovum at the commencement of segmentation? When the twins come from one ovum the condition is not so simple. It is impossible for the ovum to attain a higher degree of ripeness. The ovum before segmentation is therefore in the condition of a syncytium. The ovum, like that of Eupagurus before segmentation, is now a syncytium. While the ovum itself becomes at the same time a blastosphere. Second, the ovum is impregnated while it remains in the ovary. Its large size, as compared with the ovum, is very noticeable. The ovum has in all Reptilia a very similar structure to that in Birds. Find more words! 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What is the opposite of ovum? Words that rhyme with ovum What is the plural of ovum? What is the adjective for ovum? What is the noun for ovum? Translations for ovum Use our Sentence Generator Nearby Words ovules ovule ovulation ovulating ovulated ovulate ow OWA owe owed Owen Owenism 4-letter Words Starting With o ov ovu