Waiting for the birth of a child is an exciting period in a woman's life. To determine the obstetric gestational age, obtain reliable information about the fetal development process, determine the sex of the child, and the possible physiological characteristics of the baby, an ultrasound examination (ultrasound) of the pregnant woman is performed.
Instructions
Step 1
Thanks to ultrasound, you can get information about how the child looks at a particular period of pregnancy. The first ultrasound examination is carried out from 9 to 12 weeks when a woman is registered in an antenatal clinic for pregnancy. At 12 weeks, the baby's weight is about 90 g. The internal organs are formed, thyroid and pituitary hormones begin to be produced, the liver produces bile, the kidneys work, and rare bowel contractions are possible. There are erythrocytes and leukocytes in the child's blood. The development of the nervous system continues. Strengthening of muscles, maturation of bones occurs. Fingers and marigolds begin to form on the arms and legs. The child can move his legs, swallow, twist and roll over. The appearance of a gun at the site of the future formation of eyebrows and eyelashes on the head is characteristic.
Step 2
On ultrasound at 16 weeks of pregnancy, the child's height will be about 20 cm, and the weight is 150 g. The baby holds his head, periodically turns. Swallowing and sucking reflexes are developed. The child can grimace, somersaults, grab anything that comes across with his hands. The kidneys and intestines are working, which indicates the ability of the baby to urinate and give off gas. The genitals are formed, which makes it possible to determine the sex of the unborn baby. Ears and eyes gradually take their places. The child clearly distinguishes voices, starting to get used to them. The legs continue to thicken and lengthen. The skin takes on a pink tint. At 20 weeks, the weight of the fetus is 280-300 g, height is 25-26 cm. The skin acquires a pronounced red color and is covered with vellus hair, protective lubricant. At the 24th week of pregnancy, the baby's length is about 33 cm, weight is about 530 g. The respiratory system is forming. The individual features of the child's face were determined. Formed nose, lips. The eyes are in front. Eyelashes appeared on the eyelids, eyebrows above the eyes. The ears have taken their proper place.
Step 3
At 30 weeks, the growth of the fetus will be 36-38 cm, weight about 1, 4 kg. The child trains the formed lungs by filling them with amniotic fluid and pushing them back out. When water enters the throat, the baby begins to hiccup. A child, whose height is 42-44 cm, weighs about 2.3 kg, corresponds to 34 weeks of gestation. The skin of the fetus acquires a uniform pink color. The vellus hair disappears, the layer of original lubricant decreases, the hair on the head thickens. The nails on the fingers and toes become long, which can damage the baby's skin in utero. At 39 weeks, the growth of the fetus is 49-51 cm, and the weight is about 3.3 kg. The hair on the head can grow up to 204 cm. The baby's gaze is focused on 20-30 cm. The spinal cord, glial tissue, part of the facial nerve are formed. The child is completely ready for an independent extrauterine life.
