مقاله تخصصی
Stages of fetal development
3 months ago
233 بازدید
Dr. Zahra Saifi
تهرانSurgeon and gynecologist
**stages of embryo development**
The pregnancy period usually lasts 40 weeks or 9 months and is divided into three trimesters. The first trimester is from week 1 to 12, the second trimester is from week 13 to 26, and the third trimester is from week 27 onwards. During pregnancy, the inner layer of the uterus does not bleed like during the menstrual weeks. If the period occurs, it is expressed... ### **pregnancy period**
The fetus has its own conditions and characteristics in each trimester of pregnancy... The physical changes of the mother in the first trimester of pregnancy are more than in the following months... Correspondence... Communication methods: 44977660 and Instagram thread**
### **First trimester of pregnancy**
The fertilized egg begins to divide in the fallopian tube and continues to grow inside the uterus.. At this stage it is called a baby.. A baby that has grown up to the ninth week is called a fetus.. At this stage, most of the organs including the nervous system and the heart are developing.. Approximately in the 12th week of pregnancy, the length of this fetus is 12 weeks.. The neck of the fetus is bent and all those parts of the body are complete. And through this The fetus can move easily and remove waste materials, including urine, from its body... #### **The main symptoms of the second trimester of pregnancy**
- Nausea
- Heartburn feeling
- Willingness or reluctance to certain foods
- Frequent urination
- Breast tenderness
- Hormonal changes
- Constipation
- Sudden weight gain or loss
- Extreme fatigue
### **in the second trimester of pregnancy**
During this period, the reproductive system of the fetus is formed and the external organs are fully developed... the fetus swallows the amniotic fluid and expels it through the digestive system... the kidneys begin to work and secrete a small amount of urine... at this time, the fetus can be called a child... the rapid movements of the fetus may be felt by the mother in the second trimester of pregnancy.... - Feeling of pain in the back, abdomen, legs, chest, buttocks
- Appearance of skin spots
- Darkness around the nipple
- Swelling of organs
### **third trimester of pregnancy**
In the third trimester, the lungs of the fetus develop normally and from then on, his breathing movements are performed properly through the lungs.. During this time, his delicate hair and nails grow, he opens and closes his eyes, and the teeth begin to grow under the gums... for delivery and turns.... At this time, the head of the fetus is prepared in a position that prepares the mother for delivery... for birth... #### **The main symptoms of the second trimester Pregnancy**
- shortness of breath
- Sleep disorder
- Protrusion of the navel
- Stomach upset
- Swelling of organs
- Discharge from the chest
- Unreal contractions that are sometimes thought to be labor pains... **44977660**
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