Fetal Growth And Development Pdf

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Fetal growth and development: the role of nutrition and other factors

This book addresses the complexities of growth and maturation, structural and functional developments as well as differentiations of the human fetus. The data collected over many decades provides a deep insight into the growth and development of the human fetus, its aberrations and implications for understanding the intricacies and complexities of growth regulation up to twenty weeks of gestation. The editors bring together this extensive research from IPGMER, in addition to astute and precision research from global leaders in the fields of genetics, proteomics stem cell biology, endocrinology and molecular biology. Human Fetal Growth and Development — First and Second Trimesters is a pioneering work, stimulating further allied research in this area, and will be of interest to gynecologists, pediatricians, obstetricians, neonatologists, endocrinologists, reproductive and molecular biologists, and all students of medicine at all levels. Skip to main content Skip to table of contents.

While you might think of child development as something that begins during infancy, the prenatal period is also considered an important part of the developmental process. Prenatal development is a time of remarkable change that helps set the stage for future psychological development. The brain develops over the course of the prenatal period, but it will continue to go through more changes during the early years of childhood. The process of prenatal development occurs in three main stages. Just a few hours after conception, the single-celled zygote begins making a journey down the fallopian tube to the uterus. Cell division begins approximately 24 to 36 hours after conception.

The start of pregnancy is actually the first day of your last menstrual period. This is called the gestational age, or menstrual age. Your healthcare provider will ask you about this date and will use it to figure out how far along you are in your pregnancy. Each month, your body goes through a reproductive cycle that can end in one of two ways. You will either have a menstrual period or become pregnant. This cycle is continuously happening during your reproductive years—from puberty in your teen years to menopause around age In a cycle that ends with pregnancy, there are several steps.

Human Fetal Growth and Development

Prenatal development starts with fertilization , in the germinal stage of embryonic development, and continues in fetal development until birth. In human pregnancy , prenatal development is also called antenatal development. The development of the human embryo follows fertilization , and continues as fetal development. By the end of the tenth week of gestational age the embryo has acquired its basic form and is referred to as a fetus. The next period is that of fetal development where many organs become fully developed. This fetal period is described both topically by organ and chronologically by time with major occurrences being listed by gestational age.

Selective transcriptions are coupled with proteosynthesis, nonselective with cell division. Growth means increase in size due to an increase of existing structural and functional units. Differentiation is a process whereby a relatively simple system is changed into a more complicated one. Differentiation is accomplished by formation of new structures morphologic differentiation and by formation of new chemical compounds chemical differentiation. Development is related to biological systems a process resulting from a selective, time-related switching on and off of genes. The cell is a system of membranes, filaments and large molecules which prevent dissolved substances from mixing freely.

Health care providers who see newcomer families have a pivotal role to play in identifying and initiating early treatment for developmental disabilities. Developmental disabilities may last a lifetime but early recognition of their existence, a timely diagnosis and an appropriate treatment plan can make a difference for the children and families involved. When seeing newcomer families, recognize that risk factors are cumulative. In many parts of the world, suboptimal conditions and care during pregnancy and childbirth can have a range of impacts on developmental health. Developmental disabilities in immigrant and refugee children do not always have a known cause.

Prenatal Risk Factors for Developmental Delay in Newcomer Children

Don't have an account? This chapter examines the sources of variation in fetal growth, in particular nutrition in the context of the fetal nutritional programming hypothesis. The influence of fetal and maternal genotype on fetal growth is considered and set in the context of non-genetic intergenerational influences on birthweight, such as the mother's height and her own birthweight. The concept of programming is considered both with reference to nutritional programming and the wider view of programming, with particular reference to the hormonal, metabolic, and circulatory milieu to which the fetus is exposed. Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service.

Normal fetal growth is a critical component for a healthy pregnancy and for ensuring the health and well-being of infants throughout childhood and adolescence. Pivotal to understanding the dynamics of human fetal growth and to defining normal and abnormal fetal growth is the development of standards for fetal anthropometric parameters, measured longitudinally throughout gestation. Such measures can be used to develop interval velocity curves and customized to assess etiologic determinants such as genetic and physiological factors. Check the "Press Releases and Study Tools" section to find out how the study put these measures into practice.

Prior, D.

First and Second Trimesters

Prenatal development is highly influenced by the inheritance, expression, and regulation of genes. Developmental psychologists consider the process of human development as it relates to physical, cognitive, and psychosocial development. Prenatal development is the process that occurs during the 40 weeks prior to the birth of a child, and is heavily influenced by genetics. There are three stages of prenatal development— germinal, embryonic, and fetal. Prenatal development is also organized into trimesters: the first trimester ends with the end of the embryonic stage, the second trimester ends at week 20, and the third trimester ends at birth. Every person is made up of cells, each of which contains chromosomes. Chromosomes are genetic material that determines many things about a person, such as eye and hair color, biological sex, and personality traits.

This is called her background risk.

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  2. Laure A.

    The thyroid hormones, thyroxine T 4 and triiodothyronine T 3 , are detectable in the fetal circulation from early in gestation and have important developmental, metabolic, and maturational effects in the fetus in all species studied to date including human infants.

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