Results 261 to 270 of about 122,119 (309)
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American Journal of Sociology, 1946
India's population problem might be solved if her traditionally high fertility could be reduced. The present analysis assesses the possibility of such a reduction in the next two or three decades. The birth rate in the past shows no definite downward trend. The rural-urban differential shows no increase in the gap between city and country.
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India's population problem might be solved if her traditionally high fertility could be reduced. The present analysis assesses the possibility of such a reduction in the next two or three decades. The birth rate in the past shows no definite downward trend. The rural-urban differential shows no increase in the gap between city and country.
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An Update on Human Fertilization
Seminars in Reproductive Medicine, 1998The process of fertilization and the role that each gamete plays in that process have been the subject of investigation in a large number of species and for many years. However, while much is now known for some species relatively little is known for others.
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JAMA: The Journal of the American Medical Association, 1982
To the Editor.— Regarding the article entitled "Human In Vitro Fertilization: A Conservative View" (1982; 247:3235), I would like to challenge Dr Tiefel on several of the following points. "There is some justification for deeming in vitro fertilization to be harmful to the offspring thus conceived." Actually, there is good reason to believe that ...
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To the Editor.— Regarding the article entitled "Human In Vitro Fertilization: A Conservative View" (1982; 247:3235), I would like to challenge Dr Tiefel on several of the following points. "There is some justification for deeming in vitro fertilization to be harmful to the offspring thus conceived." Actually, there is good reason to believe that ...
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HUMAN FERTILITY IN PUERTO RICO
Obstetrical & Gynecological Survey, 1947The gross reproduction ratio of Puerto Rico has remained unchanged at a level of 2.5 from 1899 to 1940. This has resulted from a decline of marital fertility of about 25 per cent, balanced by an increased frequency of the married state. The decline of marital fertility has been greater in urban than in rural areas.
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Human in vitro fertilization and the law
Fertility and Sterility, 1984Physicians who intend to perform in vitro fertilization--or the newer alternative, in vivo fertilization and embryo transfer--should be aware of the plethora of laws that potentially cover their work. In perhaps no other area of medicine are there so many separate statutes and regulations that potentially apply.
M M, Quigley, L B, Andrews
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Dispermic fertilization of human oocytes
Journal of Electron Microscopy Technique, 1991AbstractRegardless of whether fertilization occurs in vivo or in vitro, polyspermic penetration of the human oocyte is a not infrequent cause of reproductive failure. This report describes the occurrence of human eggs fertilized by two spermatozoa and the variable developmental potentials expressed by the resultant embryos. The cellular and subcellular
J, Van Blerkom, G, Henry
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Genetics of abnormal human fertilization
Human Reproduction, 1995The purpose of this study was to assess the genetic status of abnormal zygotes following assisted fertilization. Dispermic, monopronucleated and digynic zygotes were allowed to cleave intact or after enucleation, and on the biopsied blastomeres, multiplex polymerase chain reaction and fluorescent in-situ hybridization were performed.
G D, Palermo +4 more
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The length of the human fertile period
Population Studies, 1978Abstract Estimates of the. length of the human fertile period (that interval within the menstrual cycle during which insemination is associated with a non-zero probability of conception) are necessarily indirect. Moreover, those estimates do not seem in close agreement with one another. For instance, it has been suggested that:
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A Stochastic Model of Human Fertility
Biometrics, 1971This paper describes human fertility from a stochastic viewpoint. The model consists of two transient states S1 fecundable state and S2 pregnant and infecundable state and an absorbing state R the state of death. The frequency of a womans pregnancy is represented by the number of her transitions from S1 to S2.
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Human fertility in global perspective
Journal of Biosocial Science, 1971Sir David Owen, who should have given this lecture, died very suddenly and unexpectedly at the end of June.U Thant said in a tribute: ‘David Owen was literally the first member of the United Nations Secretariat. He joined the United Nations directly from the San Francisco Conference in 1945….
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