Fetal boy or girl development process

From a biological point of view, the difference in the development of boys and girls lies mainly in the father. The father's sperm is divided into two types, x and y, while the mother's is all x. The combination of x and x is a girl, and the combination of y and x is a boy. The development process of boys and girls is the same before the 10th week of pregnancy, but there will be huge differences between the two as their organs develop.

1. What is fetal movement?

When the fetus develops to a certain stage, his movements can be sensed by the mother. The pregnant mother will feel the fluctuations in her stomach. What does fetal movement feel like?

1. The feeling of the first fetal movement

If this is your first pregnancy, you will most likely feel fetal movement for the first time between 18 and 20 weeks of pregnancy. Because the fetus is still small and lacks strength at this time, the feeling of fetal movement is intermittent, as light as the flapping of a butterfly's wings. As the pregnancy progresses, the expectant mother will gradually feel that the baby is becoming stronger and stronger, and the fetal movements are becoming stronger and more regular.

2. The feeling of fetal movement at 20-24 weeks of pregnancy

From this period onwards, the number of movements of the fetus will gradually increase. The second trimester is a period of very active fetal movement. The baby keeps kicking and somersaulting in the mother's belly, and the mother can feel the baby's movements becoming stronger and stronger.

3. The feeling of fetal movement at 24-28 weeks of pregnancy

At this time, the pregnant mother may feel her stomach jumping intermittently, which is the baby hiccuping. Now there is enough amniotic fluid in the pregnant mother's amniotic sac, and the fetus can move freely in the uterus. In addition, the fetus can already hear external sounds at this time, so the pregnant mother may feel the fetus suddenly move due to external sound stimulation from time to time.

2. Introduction to Embryonic Development

Human fertilization is completed in the upper part of the fallopian tube. Embryonic development begins when the fertilized egg is in the middle of the fallopian tube. The fertilized egg undergoes cleavage while moving down the fallopian tube toward the uterus, reaching the uterus in 2 to 3 days. At that time, the embryo is a small hollow sphere made up of many cells, called a blastocyst.

About a week after fertilization, the blastocyst implants into the thickened uterus, and this is called pregnancy. The blastocyst continues to grow through cell division and cell differentiation and is divided into two parts. One part is the embryo itself, which will develop into the fetus in the future; the other part evolves into the extraembryonic membrane, the most important of which is the amnion, placenta and umbilical cord, through which the fetus exchanges substances with the mother.

During the first two months, the embryo continues to divide and differentiate, producing various cells and forming various tissues and organs. This is a tender and sensitive period in development, and its resistance and adaptability to various external stimuli are very poor. Great attention should be paid to safety, including pregnant women taking medicines, receiving radiation or contacting other harmful factors, which will affect the normal development of the fetus. By the end of the third month, various organ systems are basically established and it is called a fetus.

Later on, the main changes are enlargement and a few structural changes. At this time, the resistance is enhanced, but miscarriage can still occur if you are not careful. After the 5th month, it is relatively safe. Due to the rapid growth of the fetus, the mother's burden becomes increasingly heavier; generally, natural delivery will occur around 280 days, which is a little more than nine months (the commonly said "ten months of pregnancy" is actually inaccurate).

3. Know the gender of the fetus early

Many pregnant women are curious about whether the baby in their belly is a boy or a girl during pregnancy. Ultrasound can help you solve this question, but today the editor will tell you some small symptoms that can help you distinguish the baby's sexually transmitted diseases. The baby is already secretly telling you.