Xem 1-20 trên 81 kết quả Reproductive biology
  • Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú y đề tài: Reproductive biology of the pampas deer (Ozotoceros bezoarticus): a review...

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  • After the first edition published in 2007 that became a best seller, the continuous scientific developments in the field have prompted us to produce the second edition of this book. As it happens in life and science, some of the novel and promising data presented in the first edition have been confirmed, some not, and new breakthrough achievements have been accomplished. Stem Cells in Reproductive Medicine, Basic Science and Therapeutic Potential, second edition, updates the revolutionary advances in stem cell science that may potentially impact on human reproductive medicine.

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  • From 1999–2003, FRONTIERS implemented a Global Agenda program of operations research (OR) projects to address the reproductive health (RH) needs of adolescents in four countries— Bangladesh, Kenya, Mexico, and Senegal. The project was implemented in urban areas of Saint- Louis and Louga, in northwestern Senegal, and was called Improving the Reproductive Health of Youth in Senegal.

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  • Conserving biodiversity is a daunting and complex task. Perhaps no species presents a greater challenge than the giant panda – one of the most recognized and threatened animals on the planet. Its difficult-to-traverse, mountainous habitat in China makes quantifying population numbers in the wild exceedingly difficult. Despite a recent survey suggesting that the wild population may be growing, there is no disagreement that the primary threat is severely fragmented habitat.

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  • As individual participants in reproductive health, men face obstacles related to traditional attitudes and practices and to a lack of information and services. Overcoming social and cultural obstacles requires more educational efforts, particularly directed to youth and their parents. Research to support these efforts should identify the specific traditional attitudes that need to be addressed.

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  • Several sexuality education programs have been evaluated, and many include a combination of abstinence messages for sexually inexperienced teens and messages about contraceptive use for sexually experienced teens. Slightly more than half of these programs show some positive impacts on reproductive health outcomes for at least some populations (Aarons et al., 2000; Eisen, Zellman & McAlister, 1990; Kirby, 2001; Thomas et al., 1992).

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  • Everyone loves the news stories about the taxi driverwho delivers a baby for the woman who could not get to the hospital on time. At some point each of us asks ourselves with awe for the first time, “Where did I come from?” It has been said of the body that it is “fearfully and wonderfully made.” How true this is of the reproductive systems on which the survival of our species depends. In this chapter, you will study the systems of the human body responsible for our being here: the male and the female reproduc- tive systems....

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  • The most commonly used measures of current fertility are the total fertility rate (TFR) and its component age-specific fertility rates (ASFRs). The TFR is an estimate of the average number of births a woman would have at the end of her reproductive years if she bears children at the prevailing age-specific fertility rates throughout her childbearing years (age 15-49). The ASFRs are defined in terms of the number of live births among women in a particular age group divided by the number of woman-years in that age group during the specific period. Figure 4.

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  • Recent studies have shown that differences in life history may lead to consistent inter-individual variation in behavioural traits, so-called behavioural syndromes, animal personalities or temperaments. Consis- tencies of behaviours and behavioural syndromes have mainly been studied in non-cooperative species. Insights on the evolution of coopera- tion could be gained from studying individual differences in life histories and behavioural traits.

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  • Several clinic-based programs have been evaluated with experimental designs and three (out of five) of them showed some positive impacts on reproductive health outcomes (Danielson et al., 1990; DeLameter et al., 2000; Orr et al., 1996). Those programs that showed positive impacts included one-on-one counseling and delivered a clear message about appropriate reproductive health behaviors (Kirby, 2001).

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  • Tham khảo sách 'mental health aspects of women’s reproductive health: a global review of the literature', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Goal It is to provide scientific arguments about the biological characteristics, and reproductive and rearing techniques of Channa lucius. The success of the project will contribute greatly to the development process of Channa lucius hatchery to supply artificial fish for aquaculture systems and renewable fish resources in the wild in the Mekong Delta as well as in the whole country.

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  • Chapter 16, 17 provides knowledge of reproductive system and sexually transmitted diseases. This chapter includes contents: Male reproductive system, female reproductive system, female hormone levels, control of reproduction, homeostasis, viral infectious diseases, bacterial infectious diseases, other infectious diseases.

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  • Chapter 19 introduce to Viruses. The main contents of this chapter include all of the following: Explain how capsids and envelopes are formed, distinguish between the lytic and lysogenic reproductive cycles, explain why viruses are obligate intracellular parasites, describe the reproductive cycle of an HIV retrovirus, describe three processes that lead to the emergence of new diseases, describe viroids and prions.

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  • Chapter 24 introduce to the origin of species. This chapter define and discuss the limitations of the four species concepts, describe and provide examples of prezygotic and postzygotic reproductive barriers, distinguish between and provide examples of allopatric and sympatric speciation, explain how polyploidy can cause reproductive isolation, define the term hybrid zone and describe three outcomes for hybrid zones over time.

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  • Chapter 30 - Plant diversity II: The evolution of seed plants. This chapter explain why pollen grains were an important adaptation for successful reproduction on land; list the four phyla of gymnosperms; describe the life history of a pine; indicate which structures are part of the gametophyte generation and which are part of the sporophyte generation;...

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  • After studying this chapter you will be able to: Distinguish between asexual and sexual reproduction; explain how hermaphroditism may be advantageous to animals that have difficulty encountering a member of the opposite sex; describe various ways in which animals may protect developing embryos; using diagrams, identify and state the function of each component of the male and female reproductive systems;...

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  • Chapter 53 - Population ecology. In this chapter, you should now be able to: Define and distinguish between the following sets of terms: density and dispersion; clumped dispersion, uniform dispersion, and random dispersion; life table and reproductive table; Type I, Type II, and Type III survivorship curves; semelparity and iteroparity; r-selected populations and K-selected populations. This chapter also explain how ecologists may estimate the density of a species, explain how limited resources and trade-offs may affect life histories,...

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  • Chapter 38 - Angiosperm reproduction and biotechnology. After studying this chapter you will be able to: Describe how the plant life cycle is modified in angiosperms; identify and describe the function of a sepal, petal, stamen (filament and anther), carpel (style, ovary, ovule, and stigma), seed coat, hypocotyl, radicle, epicotyl, endosperm, cotyledon;...

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  • Lecture Biology - Chapter 1: A view of life. After studying this chapter, you should be able to accomplish the following outcomes: List the four characteristics shared by all living organisms, define emergent property in reference to the levels of organization of living organisms, explain why maintaining homeostasis is critical for living organisms, describe how the process of reproduction leads to the evolution of species,...

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