How does the baby develop during pregnancy
Child and maternal development in the thirds of pregnancy
All organs develop in the first trimester of pregnancy. The ears, eyes and eyelids are also put on. The heart starts beating as early as the 22nd day, i.e. in the 5th week of pregnancy - from the 6th week the heartbeat can also be detected on the ultrasound. By the 12th week the fetus is about 6 cm long and 15 g. His heart beats 120 to 160 times a minute.
Developments in the mother in the first trimester of pregnancy
During the first trimester of pregnancy, the mother-to-be's body also changes - although nothing is visible from the outside. In the 3rd to 4th week of pregnancy, the embryo is implanted in the uterus. Depending on the length of the cycle, the woman will find out around the 5th week that her period has stopped. The woman is already noticing the first physical changes, such as breast tenderness and nausea. Due to the influence of the hormones, the woman's breast becomes larger and more sensitive from the 6th week of pregnancy. The uterus grows, muscles and connective tissue loosen, blood vessels expand, everything is better supplied with blood. At the latest now (around 7th week of pregnancy), typical signs of pregnancy appear. The metabolism changes. Hair changes are reduced, the skin pigmented, tendons and ligaments become softer and more elastic. The growing uterus presses on the urinary bladder and there is an increased urge to urinate. The vagina is supplied with more blood, and increased secretion can lead to vaginal discharge.
The changes in metabolism lead to increased fluid storage in the cells and to nausea, tiredness or dizziness, which typically occur in the first trimester.
A pituitary gland hormone, MSH (melanocyte stimulating hormone), affects skin pigmentation; Skin changes can occur around the nipple, on the abdominal wall, on the face and in the pubic area and, for example, existing moles and freckles can become darker. The body's basal metabolic rate and oxygen consumption increase during pregnancy.
“Eating for two” is a thing of the past. We recommend an additional calorie intake of 300 Kcal / per day and a total weight gain during pregnancy of approx. 12.5 kg for women of normal weight.) Up to the 20th week of pregnancy, pregnant women should only gain one to three kilograms. Weight loss from nausea has no adverse effect on pregnancy. If the nausea and vomiting persist, talk to your gynecologist.
2nd trimester of pregnancy
Development of the fetus in the second trimester of pregnancy
At the beginning of the 13th week of pregnancy, all organs are developed and must now increase in size and reach their full functionality. The fetus already has human features (facial features). The proportions slowly begin to adapt - the head no longer grows as quickly as the rest of the body. From the 14th week of pregnancy, the external genital organs can be distinguished. In the 15th to 18th week the bones strengthen. Sufficient calcium is required for this. The lungs also continue to develop - the fetus "breathes" the amniotic fluid in and out. From the 17th week onwards, women who have already given birth can already perceive the first child movements true in the 20th-21st week of pregnancy.
In the 19th to 22nd week, the scalp hair begins to grow and the tooth strips for the milk teeth are created. The skin loses its transparency. The alveoli develop. A child's liver and spleen start producing white blood cells. The fetus is still very thin with no subcutaneous fatty tissue. The child's movements are also noticeable for the mother. But they do not yet occur regularly. The amniotic fluid is formed in early pregnancy by ultrafiltration of the maternal plasma and excretion of the amniotic epithelium. From the twelfth week of pregnancy, the fetus also produces amniotic fluid through the kidneys and lungs.
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