Stages of embryo formation
Pregnancy is one of the most important stages in a woman’s life. Pregnancy begins on the first day after the end of the menstrual cycle and until the day of birth. The actual pregnancy takes place about fourteen days after the end of the cycle, until the egg is mature and ready for fertilization. The pregnancy period is nine months, and in this article we will inform you about the stages in which the embryo passes.
The stages of fetal formation
First trimester of pregnancy
- First week to fourth week: The egg begins to fertilize and then begins to bind itself to the lining of the uterus to protect and adapt to it.
- The fifth week: Cells grow rapidly this week until they are embryo.
- the sixth week: The spine, nerves, and vessels begin to grow, and the size of the baby, like the size of a grain of beans.
- Seventh week: The heart begins to form, where the size of the heart is like the grain of the corn, and the blood begins to pump.
- Week 8, 9, and 10: The nervous system of the fetus begins to form, and then the eyes begin to form under the skin of the face, where the head is bound to the chest, showing the ears, eyes.
- Week 11: The growth of the umbilical cord is completed, thus feeding the fetus and eliminating the waste.
- Twelfth and thirteenth week: The size of the fetus increases to 60 grams, and the size of the uterus begins to widen until it emerges from the pelvic cavity and the embryo begins to move its head easily.
Second trimester
- Week Fourteenth and Fifteenth: Pregnant women are advised to perform medical examinations during this period because of the possibility of fetal injury to the fetus.
- Week 16: The length of the fetus increases during this period as the fingers, nails, and eyelashes begin to appear.
- Week Seven and Eighteenth: During this stage, the fetus can sense some of the sounds and noise that is happening around it, and it begins to move in a circular way.
- Week 19: The weight of the fetus is approximately 300 g.
- From the 20th to the 24th week: During this period, the fetus is known as male or female. The skeleton continues to grow, and the skull begins to stiffen.
The last third of pregnancy
- From the 25th to the 30th week: The functions of the fetal organs begin to complete, and the mother may be exposed to premature birth, side effects, and tenderness and tenderness in the legs.
- From the 31st to the 34th week: The baby begins to settle down, and the baby may be headed down.
- From the 35th week to the 41st week: During this period, the child will be in contact with the pelvic cavity. The lungs will begin to function fully. The period of the baby in the womb until birth is for weight gain. The pregnancy begins at this peak, and the cervix begins to give birth. The emergence of birth symptoms brings the fetus out of the mother’s womb.