Results 171 to 180 of about 142,460 (195)
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Fertility desires and fertility outcomes
Journal of the Australian Population Association, 1991Over the last 30 years Australian fertility rates have fallen more than could have been predicted from changes in the numbers of children desired by women when they first married. This paper charts changes in desired and completed fertility in Australia, matches originally desired fertility with that ultimately achieved and explores some factors which ...
Gigi Santow, Michael Bracher
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Fertility and Fertilization of Streams
Journal of the Fisheries Research Board of Canada, 1948Streams in a rather rocky and barren region in Nova Scotia were found to have almost no algae and fish except in relation to farm operations. Placing of bags of chemical fertilizer along the shore was followed in a year or two by increased quantities of algae and fish downstream, the maximum effect only 150 yards away. It is concluded that fertilizing
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Fertility and Research on Fertility in Japan
The Milbank Memorial Fund Quarterly, 1956F the trends in the fertility of the Japanese in the years from 1920 to 1950 are viewed in broad perspective, the downward movement is quite comprehensible to those who have studied the dynamics of fertility in Western countries.1 In 1920 and 1925 fertility was higher in agricultural than in industrial prefectures, higher in villages than in cities ...
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2012
Fertilization-the fusion of gametes to produce a new organism-is the culmination of a multitude of intricately regulated cellular processes. In Caenorhabditis elegans, fertilization is highly efficient. Sperm become fertilization competent after undergoing a maturation process during which they become motile, and the plasma membrane protein composition
Matthew R, Marcello +2 more
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Fertilization-the fusion of gametes to produce a new organism-is the culmination of a multitude of intricately regulated cellular processes. In Caenorhabditis elegans, fertilization is highly efficient. Sperm become fertilization competent after undergoing a maturation process during which they become motile, and the plasma membrane protein composition
Matthew R, Marcello +2 more
openaire +2 more sources
Fertilization abnormalities in human in-vitro fertilization
Human Reproduction, 1992Fertilization abnormalities (premature chromosome condensation of spermatozoa (PCC), triploidy, haploidy) were analysed in order to determine their origin. PCC occurs in 9% of unfertilized oocytes and seems to be the consequence of a failure of oocyte activation, leading to the continuing presence of cytoplasmic chromosome-condensing factors, causing ...
Plachot, M., Crozet, N.
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2011
Mineral fertilizers have played a pivotal role in the success of the agricultural production systems. Continued exponential growth in human population and increasing demand for biofuels point to ever-increasing demand for fertilizers. Despite the apparent success of the current agricultural production systems, overuse of fertilizers has caused severe ...
MORARI, FRANCESCO, VELLIDIS G, PAIGE G.
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Mineral fertilizers have played a pivotal role in the success of the agricultural production systems. Continued exponential growth in human population and increasing demand for biofuels point to ever-increasing demand for fertilizers. Despite the apparent success of the current agricultural production systems, overuse of fertilizers has caused severe ...
MORARI, FRANCESCO, VELLIDIS G, PAIGE G.
openaire +1 more source
Future Fertility in High Fertility Countries
2014Beginning in 1960, a phenomenon occurred that John Caldwell named the ‘global fertility transition’ (Caldwell, 1997), in which fertility declines have become the general rule throughout the world, including in the majority of the less developed countries.
Fuchs, R., Goujon, A.
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Medical Journal of Australia, 1983
Publisher Summary Successful in vitro fertilization (IVF) may be approached by either of two methods that differ substantially in concept. One method of obtaining normal oocytes for IVF is to rely on the precise determination of periovular changes to predict the exact time of ovulation in the natural or spontaneous ovulatory cycle.
Carl Wood, Alan O Trounson
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Publisher Summary Successful in vitro fertilization (IVF) may be approached by either of two methods that differ substantially in concept. One method of obtaining normal oocytes for IVF is to rely on the precise determination of periovular changes to predict the exact time of ovulation in the natural or spontaneous ovulatory cycle.
Carl Wood, Alan O Trounson
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Acta Europaea fertilitatis, 1991
The whole fertilization process can be affected by the presence of iso or auto-antibodies or even Fab fragments against specific antigens involved in fertilization like FA1 sperm surface antigen and ZP1, ZP2 and ZP3 oocyte surface antigens. These knowledges can be used to develop a natural vaccine (FA1 seems to be able to inhibit fertilization).
DE PLACIDO G +6 more
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The whole fertilization process can be affected by the presence of iso or auto-antibodies or even Fab fragments against specific antigens involved in fertilization like FA1 sperm surface antigen and ZP1, ZP2 and ZP3 oocyte surface antigens. These knowledges can be used to develop a natural vaccine (FA1 seems to be able to inhibit fertilization).
DE PLACIDO G +6 more
openaire +3 more sources