A pregnancy is usually considered to take forty weeks. In these weeks, the fetus is supposed to have developed entirely thus being deemed ready for birth and the outside world. During these forty weeks, the fetus development, right from conception will involve various parts of the womb and the reproductive system of a woman. For proper discussion, the process is mostly developed into three trimesters. There are significant developments that mark each semester. Besides, there are different signs and feelings that the mother will show or have during the trimesters. They help the mother keep track of the development and the delivery time. However, some babies will be born before the forty weeks. Sometimes, it is as a result of poor calculations; that lead to the baby's delivery time being earlier than expected. In some cases, the child is born after the predicted time, however in few instances. The periods that the baby is born before the actual time is considered as premature birth. Babies born before the 37th week may develop some complications and are considered premature.
It is the first three months after you had your last period. In the first two weeks after the recent period, one is not pregnant. They are just preparing for ovulation. After ovulation, the egg is released into the fallopian tube. After sperms reach and fertilize the egg, it will slowly move towards the womb. During this time, it is just a single cell. In the time taken to reach the uterus, the egg will have divided into a mass of cells over a hundred and is now called an embryo. It reaches the womb and burrows in the lining a process called implantation. During the first five weeks of pregnancy, the embryo is not yet linked to the mother in any way. Around the fifth week, the embryo will develop and its outer layer will reach out to form a connection with the mother. The connection will be used for blood, oxygen and nutrients supply from the mother.
However, by this time the placenta or the wall of the womb is not yet fully formed. The embryo is to get nourishment from a tiny yolk sac that provides it. It will take a few more weeks before the placenta is fully formed to take over the nourishment of the baby. Apparently, the first six weeks of pregnancy will be used forming the placenta that will be the source of nourishment for the fetus. The placenta wall will penetrate deeply into the wall of the womb. It will enable it to reach for nutrients and oxygen for the growing fetus. Week ten to thirteen will be used developing the organs of the baby. These will be the initial stages. Birth defects followed by miscarriages are very common at this stage. The stage forms the fundamental foundation for the vital body organs that develop in the other semesters. You can have a pregnancy week by week break down on pregnancy development sites.
It is the stage of development of the organs where lots of nutrients are required. The placenta is already in place. Many mothers will have reduced effects of pregnancy by now. However, there may be a set of new results that include back pain, constipation, abdominal pain, and heartburn. There will be more blood to the pelvic area to strengthen the muscles to carry the pregnancy. It may lead to increased urge of sex for most mothers. Note that the urge is not common to all. In fact, some will feel tired than ever before and will not have any sexual urge. During this time, the organs will develop better. The ears can intercept noise in small bits from outside and from the mother’s digestive system. From the twentieth week, you will note slight movements from your child.
It is the last stretch of pregnancy. At this time, physical signs are evident. The fetus has grown. It necessitates the growth of the uterus. It will cause some discomfort to the mother. By now the baby is well developed. Cologne appears on the skin of the child. It is not clear why this happens. The child can move, and you can be able to notice. The mother will hear it kick. They will also respond to loud noise from outside. The organs of the fetus are now functional. It will pass some urine and heart beats will be felt. The remaining period of the pregnancy will be enough for the organs to develop fully and start functioning. The mother will feel pangs of hunger more often than before. They will also tire easily, and there could be swelling in the legs because of the increased weight. Women should consider pregnancy massage during this trimester.
By the time a mother is in the 37th week, the child is ready for birth. Labor pains will start to set in.