The role of growth factors in pregnancy is a rapidly expanding subject. With the advent of molecular biological techniques more and more detailed information is available to the researcher. This review does not attempt to be exhaustive in its coverage of growth factors in pregnancy, rather it tries to give a brief taste of the possible roles that they may play in pregnancy by considering three ...

Both organ growth and tumor growth are dependent upon a biased ratio of cell births to cell deaths; this ratio is independent of the frequency of mitosis. Thus, so-called growth factors that affect only the frequency of mitosis are not really growth factors. I shall advance two hypotheses: that the normal adult ratio of cell births to cell deaths is maintained by the activity of a factor or fac...

the hastening increase in the population of the cities ,lack of urban infrastructures ,shifting the land use and the consequent vanish of ecologically valuable lands in the countries ,industrial pollutions ,illegal settlement in the suburbs and other human activities which have influenced the growth of cities in iran too ,make it necessary to study and analyze the growth of rasht(the capital of...