Prenatal development of the child
Pregnancy And Childbirth / / August 12, 2017
stages of prenatal development of the child
-natal development of the child takes place in three stages.First, start - when the egg meets the sperm, the zygote is formed, which the cells begin to divide.This tiny creation begins to move into the uterus for implantation in its wall.Second period - fetal.It lasts up to 12 weeks of pregnancy.During this period, the child is called an embryo.A distinctive feature of the second period is that it is in these three months is the formation of all organs and body systems.After 12 weeks, begins fetal (fetal) stage of development.The kid is growing rapidly, gaining weight, improved his body.Let's look at these three periods of intrauterine development of the child and define the details of their main characteristics and in accordance with these recommendations will give expectant mothers.
first period. He comes before the delay menstruation in women, as she still does not have any evidence of her pregnancy.Therefore, many women are not always healthy lifestylecan drink alcohol, smoke, drink, drugs that are not allowed during pregnancy, do X-rays, etc. Of course, this happens primarily with women, their pregnancies are planned...But not so scary.The fact that in such an early period no damaging factors not lead to fetal pathology.If the damage is too great, the pregnancy just do not come, the fertilized egg will die.Much more dangerous teratogenic effects after the start of menstruation.That is, for more than 4 weeks of pregnancy obstetric (maternity period is counted from the first day of the menstrual cycle, and not from the date of ovulation and conception).
second period , we can say, decisive in the prenatal development of the child.If something goes wrong, most likely, there will be a miscarriage.His child, and scientifically embryo, can be seen on the screen at the ultrasound when the size is just a 2-millimeter.At 4.5 weeks of pregnancy starts beating a tiny heart, punches are fixed to the ultrasound.And this is important evidence that the pregnancy and the child develop normally.About 7 weeks of the embryo appear tactile sensations.In 9 weeks and mouthfeel.
12 weeks - the beginning of the third period of a child's development.His doctors have called the fruit.And it is at this period held the first significant ultrasound.This so-called first screening.It allows you to determine with certainty the greatest risk having a child with genetic and other disorders.If a doctor is suspected fetal malformations or chromosomal abnormalities, the woman could be recommended to carry out invasive diagnostics - amniocentesis or cordocentesis.However, the issue is usually resolved after the second screening at 16 weeks, and a control ultrasound at 20 weeks.If there is a serious deviation, doctors may advise to terminate a pregnancy.For medical reasons it can be done at any stage.I would also like to add that genetic abnormalities are found more often than older the parents.But do not let the bad.What happens to the baby, what the baby in utero by week in the second and third trimesters.
about 13 weeks the child differentiated genitals.Thus in the US, provided that it is of a good machine, and an experienced doctor, it is already possible to determine the sex of the child.True, it is not too accurate.
At 14 weeks child begins to hear sounds he perceives the truth as a vibration.This is an important stage of its development.He remembers the tone of the mother's voice, music and other ambient sounds.All of this is clearly seen after the birth of attentive parents.That's why experts recommend about the prenatal development of the expectant mother to read fairy tales aloud, listening to classical music, to before the birth of a child accustomed to the beautiful, to impart to him good taste.At 28 weeks the baby is already clearly distinguish sounds captures the intonation.
At 25 weeks child begins to see, and occasionally even opens his eyes.An ultrasound is clearly seen that the baby reacts to visual stimuli, she covers her eyes with hands.And for this reason, and because of the adverse effects of UV rays expectant mother is not recommended for a long time to happen in the open sun.Beach vacation is better to postpone.
28 weeks - another critical period in a child's life.When he is born, that he has a better chance to survive, thanks to the possibilities of modern medicine, with high quality equipment.
rest of the time the child in the womb continues to improve the nervous and respiratory system, there are hairs on my head, the subcutaneous fat.The rapidly growing weight.About a week 37-38 baby is ready for life outside the womb.