| 单词 | fecundation |
| 例句 | Malpighi and his school contended that the perfect animal is already “preformed” in the germ; for example, the hen’s egg, before fecundation, containing an excessively minute, but complete, chick. Pioneers of Evolution from Thales to Huxley With an Intermediate Chapter on the Causes of Arrest of the Movement 2012-04-26T02:00:14.960Z The experiments of Jacobi seem to confirm this opinion, since he was able to produce preternatural fecundation in the eggs of fishes. Curiosities of Medical Experience 2012-03-09T03:00:20.410Z After fecundation the ovum is pushed on into the uterus in from five to seven days, where it fastens to the wall and develops. Essays In Pastoral Medicine 2012-03-05T03:00:09.993Z It is hardly possible to ascertain how many of these ova are capable of fecundation. Principles of Political Economy, Vol. II 2012-01-25T03:00:34.150Z It is essentially necessary for fecundation that the spermatozoa should come into actual contact with the ovum. Fruits of Philosophy A Treatise on the Population Question 2011-12-03T03:00:10.910Z On the subject of the experiments in artificial human fecundation "in vitro," let it suffice for Us to observe that they must be rejected as immoral and absolutely illicit. Moral Theology A Complete Course Based on St. Thomas Aquinas and the Best Modern Authorities 2011-02-24T03:00:54.237Z This attraction is daily seen in the fecundation of the spawn of fish. Curiosities of Medical Experience 2012-03-09T03:00:20.410Z In nature these two centres of positive concentration are introduced into the protoplasm of the cell by fecundation—that is, by the entrance of the centrosomes of the sperm cell. The Mechanism of Life This is called fertilization, fecundation, impregnation or conception. The Sex Side of Life An Explanation for Young People Artificial spawning, fecundation, and hatching, are far more productive. Soil Culture With regard to artificial fecundation, not only is there reason to be extremely reserved, but it must be absolutely rejected. Moral Theology A Complete Course Based on St. Thomas Aquinas and the Best Modern Authorities 2011-02-24T03:00:54.237Z But the power that the smallest particle possesses in producing natural phenomena cannot be more evidently proved than by Spallanzani’s experiments in fecundation. Curiosities of Medical Experience 2012-03-09T03:00:20.410Z The reality of some kind of fecundation in this circumstance, and the mode of the phenomena, if there is one, are for the present equally uncertain. Fungi: Their Nature and Uses The sexual functions do not cease completely, although they cannot lead to fecundation. The Sexual Question A Scientific, psychological, hygienic and sociological study Morton, Lord, effect of fecundation by a quagga on an Arab mare, i. 403-404. The Variation of Animals and Plants Under Domestication, Volume II (of 2) Neither is the vagina indispensable, for cases are cited of the contraction of this organ accompanied by the rectovaginal fistula, in which fecundation is effected, although the fecundating fluid had been confined to the rectum. Aphrodisiacs and Anti-aphrodisiacs: Three Essays on the Powers of Reproduction Germs are visible in the ovum before fecundation; in these germs the very primordia of future organization can be distinguished. Curiosities of Medical Experience 2012-03-09T03:00:20.410Z If M. Œrsted’s opinion is confirmed, naturally the whole of the cap will be the product of fecundation. Fungi: Their Nature and Uses It remains to speak of the mechanism of expulsion of the ovule and of its fecundation, as well as the changes in the womb which result from these phenomena. The Sexual Question A Scientific, psychological, hygienic and sociological study Larkspurs, insect agency necessary for the full fecundation of, ii. The Variation of Animals and Plants Under Domestication, Volume II (of 2) However, forty-six hours elapse after fecundation before they begin to lay. New observations on the natural history of bees She seldom, perhaps never, leaves the hive, except when leading a swarm, and when but a few days old, to meet the drones, in the air, for the purpose of fecundation. Mysteries of Bee-keeping Explained It is remarkable that amongst these fungi the tube projected by the antheridium effects fecundation only by contact. Fungi: Their Nature and Uses In this case artificial fecundation by the syringe is practicable. The Sexual Question A Scientific, psychological, hygienic and sociological study Quagga, effect of fecundation by, on the subsequent progeny of a mare, i. 403-404. The Variation of Animals and Plants Under Domestication, Volume II (of 2) It is nearly about this time that the sun declining in the horizon recalls the males; queens requiring fecundation never remain later abroad. New observations on the natural history of bees Idiots and epileptics have been produced as a result of one parent being intoxicated when fecundation took place. The Eugenic Marriage, Vol. 3 A Personal Guide to the New Science of Better Living and Better Babies Its extremity never opens, and we never find antherozoids; on the contrary, the antheridium presents, up to the maturity of the oospore, the appearance which it presented at the moment of fecundation. Fungi: Their Nature and Uses There is thus manifested in the two sexes an intense and reciprocal desire of penetration one by the other, a desire which powerfully favors fecundation. The Sexual Question A Scientific, psychological, hygienic and sociological study It is by this act that the male spermatozoa is enabled to complete the function of fecundation. The Eugenic Marriage, Vol. 2 A Personal Guide to the New Science of Better Living and Better Babies I then prepared to observe the hives every moment that the fineness of the weather would invite both males and females to go abroad, for the purpose of fecundation. New observations on the natural history of bees The young queens would have been exposed to none of those risks which they now incur, in leaving the hive for fecundation. Langstroth on the Hive and the Honey-Bee A Bee Keeper's Manual It remained to discover which were the female organs which underwent fecundation from the spermatia. Fungi: Their Nature and Uses Formation of the Decidua.—After fecundation, the egg becomes attached to the mucous membrane of the cavity of the womb. The Sexual Question A Scientific, psychological, hygienic and sociological study It is a fact that in some cases sickness at the stomach manifests itself almost simultaneously with the act of fecundation. The Physical Life of Woman: Advice to the Maiden, Wife and Mother At length, having gone to seek the males, she returned with all the external signs of fecundation, and was henceforth received with every mark of respect; she laid her first eggs forty-six hours after fecundation. New observations on the natural history of bees These cases are analogous to those exceptionable cases in which, after extirpation of the ovaries, both menstruation and fecundation have still taken place. History of Circumcision from the Earliest Times to the Present Moral and Physical Reasons for its Performance This egg-cell is differentiated, after fecundation, in gradual and imperceptible transitions, farther and farther, higher and higher, until the individual has reached its perfect organization. The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality It is necessary to explain here the results of recent scientific work on the intimate phenomena of cell-division, for they are closely allied to those of fecundation. The Sexual Question A Scientific, psychological, hygienic and sociological study In short, it is a fact, now completely established, that the time immediately before, and particularly that after the monthly sickness, is the period the most favorable to fecundation. The Physical Life of Woman: Advice to the Maiden, Wife and Mother If, on the contrary, she did not attack the cell I would thence conclude that the delay of fecundation, which deprived her of the power of laying workers eggs, had also impaired her instinct. New observations on the natural history of bees He was passionately fond of women and was able to acquit himself perfectly; at least, as far as the copulative act—barring fecundation—was concerned. History of Circumcision from the Earliest Times to the Present Moral and Physical Reasons for its Performance What we see in the process of fecundation is a foreshadowing of the future man and woman. Woman Her Sex and Love Life We may, we trust, be pardoned for remarking upon the artifices imagined to prevent fecundation that there is in them an immense danger, of incalculable limits. Plain Facts for Old and Young The materialists believe that there must be marriage, and say that a living body cannot be created from a lifeless body, and without male and female there cannot be fecundation. Some Answered Questions During a month that her imprisonment continued, she did not lay a single egg; therefore, these momentary junctions do not accomplish fecundation. New observations on the natural history of bees He also taught that the earth was the universal mother of all living things, animal and vegetable, and that the fecundation of the earth took place from minute, unseen germs that floated in the air. Little Journeys to the Homes of the Great - Volume 12 Little Journeys to the Homes of Great Scientists The process of fecundation is briefly as follows. Woman Her Sex and Love Life The fact that fecundation would be impossible during pregnancy, and that during this period the female, normally, has no sexual desire, are other powerful arguments in favor of perfect continence at this time. Plain Facts for Old and Young The fact, therefore, is now scientifically established that the embryo from the first moment of conception or fecundation is a human being, having a human immortal soul. Moral Principles and Medical Practice The Basis of Medical Jurisprudence It should be remembered, that bees do not form the sole republic among insects presenting a similar phenomenon; female ants are also obliged to leave the ant-hills previous to fecundation. New observations on the natural history of bees In 1883, the Bordeaux legal tribunal declared that artificial fecundation was illegitimate, and a social danger. Studies in the Psychology of Sex, Volume 6 Sex in Relation to Society The object of courtship, he concluded, is not sexual selection by the female, but the sexual excitement of both male and female, such excitement, he asserted, not only rendering coupling easier, but favoring fecundation. Studies in the Psychology of Sex, Volume 3 Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women Alone, neither of these elements can become anything more than it already is; but the instant that the two elements come in contact, fecundation takes place, and the individual life begins. Plain Facts for Old and Young On the arrival of this period of rut, fecundation took place on a large scale, this being very easy, thanks to the promiscuity in which primitive man lived. Studies in the Psychology of Sex, Volume 1 The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism We likewise attempted artificial fecundation, and took every possible precaution to insure success. New observations on the natural history of bees Opinion, on the whole, has been opposed to the practice of artificial fecundation, even apart from the question of the probabilities of success. Studies in the Psychology of Sex, Volume 6 Sex in Relation to Society Antonyms: infertility, infecundity, barrenness. fertilization, n. enriching; fecundation, impregnation. fertilize, v. enrich, manure; fecundate, impregnate. fertilizer, n. manure, guano, phosphate of lime, compost. fervency, n. Putnam's Word Book What to Do.—Now to the question as asked by the first parties—married people who together seek for a solution of the difficulties arising from an abandonment of all protectives against fecundation. Plain Facts for Old and Young That the maximum of physiological sexual excitement should tend to appear earlier than the maximum of fecundation is a result that might be expected. Studies in the Psychology of Sex, Volume 1 The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism Though these different experiments were unsuccessful, it was proved that queens leave their hives to seek the males, and that they return with undoubted evidence of fecundation. New observations on the natural history of bees Thus, in France, where there is a considerable literature on the subject, the Paris Medical Faculty, in 1885, after some hesitation, refused Gérard's thesis on the history of artificial fecundation, afterwards published independently. Studies in the Psychology of Sex, Volume 6 Sex in Relation to Society The description which I have given of the Ovulum of Kingia, though essentially different from the accounts hitherto published of that organ before fecundation, in reality agrees with its ordinary structure in Phaenogamous plants. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 In most instances the fecundation of flowers is chiefly effected through a purely mechanical process, though in these cases also we see a wonderful adaptation of parts to conditions. Plain Facts for Old and Young Dewees quotes two cases, in one of which the child was carried twenty months in the uterus; in the other, the mother was still living two years and five months after fecundation. Anomalies and Curiosities of Medicine When fecundation took place within the first sixteen days, she produced both species of eggs. New observations on the natural history of bees In another case, recorded by Schwalbe, in which the husband was impotent but not sterile, six attempts were made to effect artificial fecundation, and further efforts abandoned on account of the disgust of all concerned. Studies in the Psychology of Sex, Volume 6 Sex in Relation to Society I have formerly more than once* adverted to the structure of the Ovulum, chiefly as to the indications it affords, even before fecundation, of the place and direction of the future Embryo. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 Nature provides for thorough fecundation in these cases by placing the plants which bear the male and the female flowers near each other. Plain Facts for Old and Young The first authentic account that we have of artificial impregnation is that of Schwammerdam, who in 1680 attempted it without success by the fecundation of the eggs of fish. Anomalies and Curiosities of Medicine But this result is the more remarkable, as the queen did not commence laying until four months and a half after fecundation. New observations on the natural history of bees That the seeds exist in the ovarium many days before fecundation. The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation The first consisting of those, among whom are several of the most eminent carpologists, who have regarded the coats of the seed as products of fecundation. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 The male of a species of South American fish gathers up the eggs after fecundation has taken place, and carries them in his mouth until they are hatched. Plain Facts for Old and Young In the presence of such facts one can but wonder if artificial fecundation of an ovum derived from another woman may ever be brought about in the uterus of a sterile woman! Anomalies and Curiosities of Medicine My evidence is demonstrative, for I can always prevent queens from laying the eggs of workers, by retarding their fecundation until the twenty-second or twenty-third day. New observations on the natural history of bees That after fecundation a body begins to appear within the cavity fixed by two points to the sides, which in process of time proves to be two lobes containing a plantule. The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation The consideration of the arillus, which is of rare occurrence, is never complete, and whose development takes place chiefly after fecundation, might here, perhaps, be entirely omitted. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 In higher orders of animals, fecundation takes place within the generative organs of the female by contact between the male and the female organs. Plain Facts for Old and Young Reproduction: by cell division, by the conversion of the cell contents into zoospores, and by resting spores, formed sometimes after conjugation; in other cases, probably, by fecundation by spermatozoids. Scientific American Supplement, No. 384, May 12, 1883 The problem becomes still more difficult by reflecting on the natural state of things, that is when fecundation has not been delayed. New observations on the natural history of bees Woman passes through the stages of fecundation, pregnancy, and lactation. Youth and Egolatry The inner membrane of the ovulum, however, in general appears to be of greater importance as connected with fecundation, than as affording protection to the nucleus at a more advanced period. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 It may come in contact with the zoösperms at any point between the ovary and the lower orifice of the uterus, and thus undergo fecundation. Plain Facts for Old and Young Reproduction by zoospores formed of the whole contents of a cell, with a crown of numerous cilia; resting spores formed in sporangial cells after fecundation by ciliated spermatozoids formed in antheridial cells. Scientific American Supplement, No. 384, May 12, 1883 Artificial fecundation, you are aware, has already succeeded in more than one animal. New observations on the natural history of bees Thus, for the past five years he had been making some curious experiments on a collection of hollyhocks; he had obtained a whole series of new colorings by artificial fecundations. Doctor Pascal Many of these flowers, both before and after their season of fecundation, erect their heads perpendicular to the horizon, like the Meadia, which cannot be explained from meer mechanism. The Botanic Garden. Part II. Containing the Loves of the Plants. a Poem. With Philosophical Notes. It is supposed that fecundation is chiefly necessary to give to the gemmules the requisite amount of nourishment to insure development. Plain Facts for Old and Young These important early embryonic processes take place so quickly in the Amphioxus that four or five hours after fecundation, or about midnight, the spherical blastula is completed. The Evolution of Man — Volume 2 She departed, indeed, but made four and twenty fruitless attempts before returning with the evidence of fecundation. New observations on the natural history of bees More than all, she abandoned the pastels, copies of flowers from nature that she had been making, to serve as plates to a work on artificial fecundations. Doctor Pascal Fatal, I say, for it is a singular fact in the history of bees that the fecundation of the queen costs the male his life. Locusts and Wild Honey In rare cases, three or even four ova are matured at once, and by fecundation produce a corresponding number of embryos. Plain Facts for Old and Young The individual man needs only nine months for his complete development, from the fecundation of the ovum to the moment when he leaves the maternal womb. The Evolution of Man — Volume 2 Having found no external appearance of fecundation, we allowed her to enter. New observations on the natural history of bees Surely this species seeks the water at the time of fecundation, for so do all batrachians, the water being indeed a more fitting medium for fecundation than the air. Louis Agassiz: His Life and Correspondence The geographical importance of insects proper, as well as of worms, depends principally on their connection with vegetable life as agents of its fecundation, and of its destruction. The Earth as Modified by Human Action The flowers of some plants, during and after fecundation, also show an increase of heat, in some cases so marked as to be readily detected with the thermometer. Plain Facts for Old and Young But she survived to become a mother, just as, in oaks, immediately after fecundation, the male flower fades and falls, while the female continues and ripens into perfect fruit. Hyperion She soon took advantage of it; and was not long of returning with the most evident marks of fecundation. New observations on the natural history of bees It is the moment of fecundation, or the union of the germ and sperm cells, which marks the beginning of pregnancy. The Four Epochs of Woman's Life; a study in hygiene LARKSPURS, insect agency necessary for the full fecundation of. The Variation of Animals and Plants under Domestication — Volume 2 Modes of Fecundation in Animals.—The modes by which fecundation is effected in animals are still more various and wonderful than in plants. Plain Facts for Old and Young In regard to the former point—contraction of stigmatic chamber—I may remark that it does not appear to be absolutely necessary that the pollen-masses penetrate this chamber for effecting fecundation. More Letters of Charles Darwin — Volume 2 POLLEN.—The male element in flowering plants; usually a fine dust produced by the anthers, which, by contact with the stigma effects the fecundation of the seeds. The Origin of Species by means of Natural Selection, 6th Edition All these symbols of fecundation, these perfumes, radiations, and breathings overwhelmed him. Salammbo INSECTS, regeneration of lost parts in. -agency of, in fecundation of larkspurs. -effect of changed conditions upon. -sterile neuter. -monstrosities in. The Variation of Animals and Plants under Domestication — Volume 2 In this class of animals the process is almost wholly analogous to fecundation in those plants in which the male and female flowers are on different plants or different parts of the same plant. Plain Facts for Old and Young The occurrence of multiple pregnancies may be explained by the supposition that ova matured subsequent to the first fecundation are also fecundated. Plain Facts for Old and Young If fecundation does not occur, it is expelled or absorbed after six to twelve or fourteen days. Plain Facts for Old and Young More recently another German physician has advanced the theory that the sex may be controlled at will by observing the time of fecundation. Plain Facts for Old and Young MORTON, Lord, effect of fecundation by a quagga on an Arab mare. The Variation of Animals and Plants under Domestication — Volume 2 Human hermaphrodites are usually so deformed that fecundation is not effected, which is a fortunate safeguard against the multiplication of such monstrosities. Plain Facts for Old and Young It is interesting to observe the different methods by which fecundation is effected, both in plants and animals, for this is a process common to both. Plain Facts for Old and Young At the proper moment, the corolla contracts in such a way as to bring the stamens nearer to the stigma, or in contact with it, so as to insure fecundation. Plain Facts for Old and Young In some aquatic plants the flowers elevate themselves above the surface of water while the process of fecundation is effected; submerging themselves again immediately afterward. Plain Facts for Old and Young Fecundation in Hermaphrodites.—The process of fecundation in hermaphrodite animals is very peculiar. Plain Facts for Old and Young If fecundation occurs, the result will be a development of two embryos at the same time. Plain Facts for Old and Young Unprotected Development.—Most fishes and reptiles discharge their ova before fecundation, or soon after, and pay no further attention to them. Plain Facts for Old and Young |
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