Xem 1-20 trên 45 kết quả Reproductive cycle
  • This book offers an overview of the complex interplay between hormonal activation and individual and environmental influences on health and disease in women. The book provides useful information and background material important for treating problems related to the reproductive cycle, eating disorders, drug treatment of women, and clinical and treatment issues in coronary artery disease and breast cancer. This is a medically-oriented book written firstly for the practicing

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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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  • From ancient times until the modern technological age, healthcare was mostly for, about and by women. The wonder of the reproductive cycle, the miracle of birth and the powerless mystery of death were the domains of women who watched over them. Before the dawn of patriarchy, women were the natural healers and guardians of the mysteries and stories of the people. Women looked to the earth from where life began and where the food for sustaining life was grown for help in healing the ill.

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  • Within developing countries, health sector reform, often including decen- tralized priority setting, increases the information and advocacy burden for inclusion of SRH concerns. Central functions (like operating logistic systems and service quality control) require high-level commitment and a supportive policy and regulatory framework. The international discussion on SRH emphasizes an outcome-oriented public health approach but people react to multiple dimensions. Strong pas- sions and intensive debates continue on a range of issues: abortion, adolescent SRH and even family planning.

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  • After studying this chapter, you should be able to accomplish the following outcomes: List the four stages of interphase, and describe the major events that occur during each stage in preparation for cell division; describe the difference between mitosis and cytokinesis; list the checkpoints that regulate the progression of cells through the cell cycle;...

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  • Chapter 27 - The reproductive system (part c), the main contents of this chapter include all of the following: Establishing the ovarian cycle, establishing the ovarian cycle, hormonal interactions during a 28-day ovarian cycle, uterine (menstrual) cycle, effects of estrogens,...

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  • 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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  • (BQ) Part 2 book "Endocrine and reproductive physiology" presents the following contents: The adrenal gland, life cycle of the male and female reproductive systems, the female reproductive system, the female reproductive system, fertilization, pregnancy, and lactation

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  • All living organisms require food for survival, growth, and reproduction. Most broadly, the term food can be taken to include any kind of nutrient needed by animals, plants, and simpler forms of life, on down to bacteria. This would include, for example, the inorganic substances that plants draw from air and water. The processes that circulate these basic nutrients in the environment are called nutrient cycles, and the processes by which organisms make use of nutrients are collectively known as metabolism....

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  • Blood clam (Scapharca subcrenata) was collected monthly from Pusan, Korea to investigate the reproductive cycle and the occurrence of mud worm (Polydora sp.). Histological observation showed that S. subcrenata started their gametogensesis as early as March when environmental temperature increased. Most of clams underwent ripe stage in June and some of observed samples already spawned in July.

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  • Writing a book like this requires a number of key ingredients. One is the body of sophisticated and exciting research on reproductive biology and health from which I have drawn extensively. A quick glance at the list of references cited provides a good compilation of the work that I believe has the most to offer as we try to understand challenges to women’s health that we are facing and will continue to face as global resources constrict, population expands, and more and more people strive for the lifestyles of the ‘‘health-rich’’ nations.

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  • Short-term benefits have been noted in studies comparing immediate start of COC with conventional start.14 In a randomised trial, those who were quick started were more likely to start their second pack of pills (OR 1.5; 95% CI 1.0–2.1). However at 3 and 6 months, continuation rates were comparable between the two groups.16 This study involved mainly socially deprived young Latino women and therefore these findings may not translate to other groups of women.

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  • There is a theoretical concern that women with a short menstrual cycle may ovulate very early in their cycle, putting them at risk of pregnancy if starting contraception as late as Day 5 or Day 7 (LNG-IUS). There is no strong evidence to support or refute the risk but some sources of patient information (e.g. FPA) advise additional contraception for women in this situation if they have a cycle shorter than 23 days. Faculty guidance on postnatal sexual and reproductive health includes recommendations on starting contraceptive methods after childbirth.

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  • Although not specifically referred to as quick starting, previous Faculty guidance has advised that contraceptive methods can be started at any point in the menstrual cycle if a practitioner is reasonably certain that the woman is not currently pregnant (Box 1)8 or at risk of pregnancy. As sperm may be viable in the female reproductive tract for up to 7 days, health professionals should consider if a woman is at risk of becoming pregnant as a result of unprotected sexual intercourse (UPSI) within the last 7 days.

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  • Women usually produce one mature egg per menstrual cycle. Because IVF is so expensive, current clinical practice is to give women hormonal drugs to stimulate multiple eggs in one cycle, to increase their chances of pregnancy. For this process, women inject three different hormones over the course of four to six weeks to “shut down” their ovaries, “hyperstimulate” them, and to control the timing that the mature eggs will be released.

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  • In addition to ovulation, another critical function occurs during the menstrual cycle. The woman’s body must be prepared in case fertilization occurs. Everything must be ready to nurture the developing embryo. Dur- ing the first two weeks of the cycle, estrogen causes the lining of the uterus to thicken. There is also an increase in the amount of blood that flows to this area. During the second half of the cycle, after ovulation has occurred, the follicle (now without the egg cell) develops into a yellow-colored body, the corpus luteum.

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  • The growing tissue then begins to release more hormones to keep everything in the right condition. How- ever, if fertilization does not occur, the continued preparations in the uterus are unnecessary. The body realizes this near the end of the four- week period of the menstrual cycle. At this time, the level of LH decreases, the corpus luteum breaks down, and the level of progesterone decreases. Without this hormone, the uterine lining no longer remains intact. Instead, the lining breaks down.

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  • Only human females and some other higher primates have a regular monthly menstrual cycle. Humans, however, are able to mate at any time. Females of almost all other mammal species will mate only at specific times during a year. These times are known as estrus or “heat.” It is only during estrus that egg cells are released for fertilization. Estrus occurs in wolves and deer once a year, in dogs usually twice a year, in cows and horses once a month, and in rats and mice every few days. Ovulation, mating, and fertilization occur on a specific timetable.

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  • Sexual and reproductive health (SRH) was given an international consensus def- inition at the International Conference on Population and Development (ICPD) in 1994. At its core is the promotion of healthy, voluntary and safe sexual and reproductive choices for individuals and couples, including decisions on family size and timing of marriage, that are fundamental to human well-being. Sexual- ity and reproduction are vital aspects of personal identity and key to creating fulfilling personal and social relationships within diverse cultural contexts.

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  • The HIV/AIDS pandemic constitutes a major threat to development in affected countries. The virus is spreading through different populations at varying rates, and prevalence rates among adults range from a fraction of a percent to well over 30 percent. In sub-Saharan Africa and parts of the Carib- bean, the epidemic is clearly established in the general population and is largely spread through heterosexual contact. Whatever the main means of transmis- sion, however, it is almost always the poor and the marginalized that are at greatest risk of exposure.

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