3 stages of prenatal development pdf

However, you do not have to read the description of embryonic or fetal development for gestational. This quiz and worksheet combo will help test your understanding of the different. Having a healthy pregnancy is one of the best ways to promote a healthy birth. Factors affecting prenatal development the elaborate details of life begin with a single cell that develops into a full term fetus within approximately 40 weeks, 280 days or 10 lunar months. Investigate the earliest stages in the human life cycle those that take place before birth. Three stages germinal stage zygote embryonic stage embryo fetal stage fetus principles of development. Germinal period the first two weeks after conception. The zygote is transformed into an embryo and then a fetus. Stages of prenatal development linkedin slideshare.

This environment consists of three major structures. Prenatal environmental influences the 9 stages of human. Scientists have learned that there are indeed three stages of prenatal development, but the developing child has already reached the third stage before the. Compare the images to see the growth of the fetus in each. Describe the stages of prenatal development and the significance of prenatal care define and differentiate between various infant reflexes as discussed at the beginning of this module, developmental psychologists often divide our development into three areas. Read about the changes that take place during each trimester in figure 19. The process of growth and development within the womb, in which a singlecell zygote the cell formed by the combination of a sperm and an egg becomes an embryo, a fetus, and then a baby.

Risks during the prenatal period include the following. Ibrahim hakki acar,1 xiaoqing tu,1 kate sirota,2 and brian keiser 3. The neonatal period extends from birth to one month. The first two weeks of development are concerned with simple cell multiplication. Healthy weight gain during pregnancy is 2530 lbs and folic acid is important in neural tube development. From the 10th week of gestation 8th week of development, the developing organism is called a fetus. Prenatal development true or false one that can successfully fertilize the study of development begins at birth. In the second half of the 20th century, inspired by medical science.

Promoting healthy prenatal development prenatal development is divided into three distinct stages these are the zygote, embryo and the real sense these three periods are a representation of continuous phases of development during which the developing organism is sustained and protected by amniotic sac, placenta and. Embryonic period the 3rd to the 8th week after conception. The development stages of pregnancy are called trimesters, or three month periods, because of the distinct changes that occur in each stage. First trimester week 1week 12 during the first trimester your body undergoes many changes. General embryology detailed animation on second week of development. By understanding the stages of its growth, you can be well prepared to handle any issues that may arise during this time.

Stages of prenatal development pregnancy articles family. Environmental influences cont maternal factors stress unusual stress during pregnancy at elevated risk of malformations. About three days later, the fertilized egg cell divides rapidly and then passes through the fallopian tube into the uterus, where it attaches to the uterine wall. Step one of conception is when the sperm penetrates the egg to complete the genetic makeup of a human fetus. The three stages of prenatal development are the germinal stage, the embryonic stage and the fetal stage.

The process of prenatal development occurs in three main stages. Prenatal development embryo at 4 weeks the four folds in the front of the head will become facial features. Summary prenatal development development happens quickly during the prenatal period, which is the time between conception and birth. In 28 weeks of pregnancy, the brain activity resembles that of a sleeping baby. These stages are also referred to in pregnancy as terms or trimesters. This care can begin even before pregnancy with a prepregnancy care visit to a health care provider. Prenatal development is the process that occurs during the 40 weeks prior to the birth of a child. Jul 31, 2011 factors affecting prenatal development the elaborate details of life begin with a single cell that develops into a full term fetus within approximately 40 weeks, 280 days or 10 lunar months. Explain how the developing embryo and fetus may be harmed by the presence of teratogens and describe what a mother can do to reduce her risk. Please contact your physician or health care provider, community health nurse, or local community health center to learn more about fetal growth and development.

May 09, 2018 a babys development takes place rapidly during the prenatal period. Fetal development is the third of the three stages of prenatal development, following from the initial germinal stage preembryonic stage, and stage of embryonic development. From the 11th week onwards, to the child birth, embryo is called fetus and this stage of development is known as fetal development. Pregnancy and childbirth pregnancy stages month by month. Prenatal development takes about 38 weeks to complete and goes through these three developmental stages. The twoweek period after conception is called the germinal stage. In the final step of gamete division, however, called meiosis, each new cell receives only one chromosome from each original pair. As the matter of fact all major organs in the body start to develop in first 11 weeks of pregnancy and this is why this stage of prenatal development is so important. This period is generally divided into three stages. A prepregnancy care visit can help women take steps toward a. Their babies are less likely to contract bronchitis, pneumonia, or colds. Cleveland clinic is a nonprofit academic medical center. Eating a variety of foods each day is the best way to make certain that both mother and baby are getting all the nutrients they need. Developmental psychology has expanded to include adolescence and adult development, and aging and thus now addresses psychological changes and functioning across the entire life span.

Nature and nurture combine forces in prenatal development. We do not endorse noncleveland clinic products or services. Proportionally greater growth and development takes place 4. These nine months are divided into three 3month periods called trimesters. Hereditary characteristics were set from the moment the mothers egg ovum and the fathers sperm met. This is considered to be the most important stage of prenatal development since there is some foundational embryo development. Promoting healthy prenatal development prenatal development is divided into three distinct stages these are the zygote, embryo and the real sense these three periods are a representation of continuous phases of development during which the developing organism is sustained and protected by amniotic sac. Prenatal development and the 3 stages biology dictionary. The course of this prenatal development is divided into three main periods. Conception occurs when an egg from the mother is fertilized by a sperm from the father. Childhood begins at two years of age and lasts until adolescence. The current opinion, however, is that the prenatal development of the fetus and its growth and development after birth are directly related to maternal diet. This tiny mass of cells then adheres to the inside wall of the uterus.

Prenatal development, the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth. This process can be divided into three distinct stages. It also requires special care and precaution measures, as well. The fetal stage lasts from week 9 until the childs birth usually between 38. These nine months are divided into three 3 month periods called trimesters. Emotional stress intense stress during pregnancy can cause miscarriage, prematurity, cleft palate and heart deformities maternal age women who wait until 30s or 40s to have children.

From beginning as a onecell structure to your birth, your prenatal development occurred in an orderly and delicate sequence. Final stage of prenatal development from 8 weeks to birth, characterized by increased differentiation of body parts and greatly enlarged body size ultrasound prenatal medical procedure using highfrequency sound waves to detect the outline of a fetus and its movements used to determine whether a pregnancy is pregressing normally. Germinal stage weeks 12 in the discussion of biopsychology earlier in the book, you learned about genetics and dna. Lets take a look at what happens to the developing baby in each of these stages. Prenatal determinants of early behavioral and cognitive. Teratogens are agents or substances that can produce developmental malformations. Factors affecting prenatal development essay 1145 words. Conception conception occurs when a sperm cell penetrates and fertilizes an egg cell successful conception depends on ovaries releasing one healthy egg cell egg cell migrates most of the way down the fallopian tube one sperm must penetrate the ovum to form a zygote. Treyemessturs find out whats happening with you and your baby in these three stages. Prenatal development is also organized into three equal trimesters, which do not correspond with the three stages. Conception occurs when a sperm cell combines with an egg cell. The stages of prenatal development are presented pictorially as follows.

Once the egg blastocyst reaches the uterus it starts embryonic stage of development. Read more to know about prenatal stages along with problems and risks associated in it. Infancy begins at one month and continues to two years of age. The study of development begins at the moment of conception the sperm fight to be the only the egg. The influence of nature and nurture in prenatal development. Nutrition the poorer the prenatal diet of the mother, the greater loss in the babys brain weight.

Throughout this period, the development of a brain takes place rapidly and the nervous system begins to respond to the growth of the foetus. Conception occurs when a sperm cell combines with an egg cell to form a zygote. Maternal malnutrition may affect not only the size of the infant but also the development of systems such as the immune system or the brain. It takes about 40 weeks or nine months to create a new life, and your pregnancy is broken into three, 12week. Detailed animation on second week of development duration. Prenatal development boundless psychology lumen learning. Getting early and regular prenatal care improves the chances of a healthy pregnancy. The germinal stage the twoweek period after conception is called the germinal stage. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period. There are various growth stages that take place during prenatal development. A mother and fathers dna is passed on to the child at the. Prenatal development starts at conception and ends with the birth of your baby. The first trimester months is essential to the proper development of the infant and encompasses both the ovum and embryonic period of prenatal.

Women who follow nutritionally sound diets during pregnancy give birth to babies of normal or abovenormal size. Rosemary boon from a single fertilized egg of about 0. Following this until birth, the baby keeps growing and the lungs start to expand and contract. The presentation explains the definition of conception, the 3 stages of prenatal development giving monthtomonth brief explanations, the 3 stages of labor and 4 possible bi. At this moment conception, the sex and genetic makeup of the fetus begins. Feb 20, 2014 stages of prenatal development conception germinal embryonic fetal 3. Development happens quickly during the prenatal period, which is the time between conception and birth. Stages of prenatal development conception germinal embryonic fetal 3. Child growth and development pregnancy and prenatal. Keith, 1975, but it may cause some attenuation abrams et al.

The first two weeks after conception are known as the germinal stage, the third. Pdf for decades, researchers have investigated how events in the prenatal period. Emotional stress intense stress during pregnancy can cause miscarriage, prematurity, cleft palate and heart deformities. In the early stages of development, gametes divide as all other cells do a process called mitosis, with each set of 23 chromosome pairs duplicat ing itself. The amniotic sac is the fluidfilled reservoir in which the embryo soon to be known as.