The development of the fetus by weeks of pregnancy - how the growth of the baby
During all the weeks of pregnancy from conception Conception, ovarian cycle, fertilization and genetics baby to the long-awaited birth of the child there are processes of formation and development of the fetus.Each week has its own idiosyncrasies, which also needs to know the pregnant woman in order to avoid various negative effects or complications.Fetal development by week pregnancy is a complex process, which largely determines the successful development of major organs and systems of the future child.
most critical weeks in the development of the first trimester
throughout a subsequent pregnancy depends on how the formation was at the stage of embryo development.It was during this period laid all the major organs and functional systems.In the first 5-6 weeks of the embryo are laid following organs - eyes, ears, thyroid, liver, lungs, intestines.It appears the brain, the spine, the nervous system is laid (it takes 16-18 days after conception).By the end of 6 weeks, the embryo appears cardiac activity, heartbeat.At 7-8 weeks are actively processes of formation of all internal organs.The embryo can already be called a baby.The basic system of the fetus (the nervous and muscular system, musculoskeletal system) is sufficiently developed in this period, so the fruit is already beginning to stir, but this is the expectant mother feels.At 10 weeks the brain and the Hemisphere are fully formed, there is increased development of the cerebellum.Its further development leads to the fact that the fetus as it grows will make movements smooth, not chaotic.Also in this period the forming of the mouth and digestive tract only, the fruit can swallow.
By the end of the first trimester (12-13 weeks of pregnancy is) fully formed placenta, one of the most important organs.Start the process of formation of the placenta falls on the fourth week of pregnancy.The main function of the placenta - delivery to the fetus from the mother of all necessary for full development.The placenta also occurs production of hormones, which is especially important that the pregnancy develops normally.The fetus continues to grow in full 14 weeks is already a little man.At this stage of pregnancy there is an active development of the sex organs - the boy from the future of the prostate gland and the ovaries in girls.Also, the fetus is formed lanugo (also called germinal guns) whose main function is protective.He repeats the individual microscopic pattern of the skin, which is a feature of every human being.
How is fetal growth later
first half of pregnancy ends 20 weeks.The fruit weighs an average of 300 grams, and its length is 25 cm. It is actively growing, all body systems continue to evolve.By the 20th week, almost fully formed nervous system.At about 24 weeks the baby can dream, he falls asleep.It produces its own rhythm of alternating sleep Dreams: how to understand our dreams and recreation and this rhythm is not the same rhythm mom - mom wants to sleep when the baby is moving strongly.At that time, when he is awake, he is listening to what is happening around and is capable of all the sounds of native voice mum highlight that recognizes after his birth.It is very useful to talk to him, give or listen to quiet music to classical, as various sharp sounds may frighten him.The future Pope must also take an active part in the process of communicating with your baby.Throughout the second trimester, the unborn child is studying himself - he can touch his face and ears, thumb sucking, compress cams, and even touch the hand cord.Kid actively moves, turns and hustles, he coughs and hiccups.He swallows amniotic fluid from a small amount of liquid, and then displays it through the kidneys in urine.The process of ingestion causes hiccups hiccups - but if it's something serious? .At this point the mother feels that the baby leaped like, or as a light tapping inside.
within the period of 27 weeks is intense pulmonary maturation of the fetus.This is manifested in the fact that mature specialized cells that produce the necessary material for the pulmonary surfactant activity - with the help of easy to straighten out during the child's first breath after birth.If a baby is born prematurely, prematurely birth, it is due to lack of full maturation of surfactant having problems with his-nursing.28 weeks is a critical step for the full development of the main centers of the brain and the cortex.Unborn child is able to feel pain, to distinguish the subtle flavors.Fetus are formed muscle, it is actively growing, and its weight is almost one kilogram, and the growth of 35 cm.
the thirtieth week of pregnancy begins the third trimester.This time, the final formation of all major systems of the child, including the immune system immune system - how it works? , whose main function is the ability to withstand the effects of pathogens.At 34 weeks of completed development of the cells of the pulmonary system, because when a child is born in this time he can breathe on his own without the help of special equipment.Before the period 33-34 weeks the fetus can still change its position in the uterus, roll leg or head down.In the future, the fetal position is becoming a major and usually does not change.At this stage of its development, the child is only growing and gaining weight.On average, 35 weeks pregnant it weighs from 2100 to 2700 grams, it is gaining daily 14-15 grams.Kid continues to grow and prepares for the birth.At 38 weeks the baby is considered full-term has, so it can be born in the very near future.38,39 and 40 completed weeks of pregnancy and the birth process of development of the fetus full-term newborns.