Pregnancy
Pregnancy occurs as a result of fertilizing an egg with sperm and then fertilizing the fertilized egg in the womb. The gestation period is usually forty weeks or 280 days from the last menstrual cycle.
Stages of pregnancy
Pregnancy is divided into three phases:
- The first stage: Be from the first week to the thirteenth, the most prominent of which is hearing the fetal pulse.
- The second phase: From the fourteenth to the twenty-seventh, and this stage is characterized by the development of the fetus’s ability to hear and the mother’s sense of fetal movement.
- third level: From the 28 th week until the fortieth week or the birth, and this stage is characterized by increasing the weight of the fetus significantly.
Pregnancy stages are forming the embryo
The first stage of pregnancy forms the fetus
- First week: You are not actually pregnant this week, but are counted within the gestation period starting from the last menstrual period, where the thickness of the uterus increases in preparation for receiving and feeding the fertilized egg.
- second week: Is the most fertile week, where ovulation takes place and the egg goes to the Fallopian tube and meets the sperm in preparation for pregnancy.
- the third week: The fertilized egg (Zygote) produces the egg’s union with the sperm in the fallopian tube, and the split begins during its journey towards the uterus to form a cluster of cells similar to the fruit of the berries.
- fourth week: The fast-dividing cell group is called the Blastocyst, which begins with endometrial implantation. The inner cells of the embryonic cyst are the embryo, and the outer part is part of the placenta that feeds the fetus during pregnancy.
- The fifth week: The embryo is composed of three layers, the upper layer, which will consist of the outer layers of the skin, the nervous system, the eyes, the inner ear, then the middle layer, which will consist of the heart, bones, ligaments, kidneys, reproductive system, and the inner layer will form the lungs and intestines.
- the sixth week: Small buds appear to form hands, legs and ears later, and organs begin to grow, such as the lungs and brain. This week, the baby’s pulse can be observed through the ultrasound.
- Seventh week: The brain and face grow this week, nose openings appear and the retina begins to form.
- The eighth week: This week, the upper lip and nose appear and the fingers begin to form, while the neck and trunk begin to straighten.
- Week Nine: During this week the toes appear and the eyelids are formed, and the embryo is characterized by a large head and a clearly undiscovered chin.
- Week 10: The tissue between the fingers, hands or feet disappears, and the eyes are fully open but soon they will close with the eyelids.
- Week 11: The liver begins to build red blood cells, and at the end of the week the visible genitalia begin to form.
- Week 12: The nails began to form either the intestines are in the belly of the fetus now, and weighs up to about fourteen grams.
- Week 13: The amniotic fluid is then imbibed and then again ingested, and the bone stiffness gradually increases.
The second stage of pregnancy forms the fetus
- Week Fourteen: The soft, fluffy hair (Lanugo) covers the fetus’s body to give it a warm feeling.
- Week 15: The size of the fetus increases to about the size of the apple and the fetus and the mother is exposed to the sensation of trembling later, and it is noticeable growth of more hair at this stage, such as eyebrow hair.
- Week 16: The head appears in a familiar way where the eyes and ears are located in their natural positions, and if the fetus is female, the ovaries make thousands of eggs during the week.
- Week 17: The blood flows through the circulatory system, the kidneys clear the urine, and the lungs breathe in the amniotic fluid.
- Week 18: The fetus may start hearing this week, and the digestive system will also work, and the fetus will reach 140 millimeters and weigh 200 grams.
- Week 19: A fatty layer similar to cheese covering the embryo’s body is called Vernix Caseosa to protect its sensitive body from any scratches and bumps that can be exposed to amniotic fluid. If the fetus is female, the uterus and the vaginal canal begin.
- Week Twenty: This week is the middle of the pregnancy journey, and the mother can feel the movements of the fetus as he sleeps and wakes regularly.
- Twenty-first week: Teeth appear in the fetal gums, and the intestine begins to produce the first stool produced by the baby after birth, and the bone marrow concentrates its manufacture of red blood cells to deliver oxygen to the body later.
- Week Twenty-Second: The brown sebaceous tissue begins to provide a source of heat for the fetus. If the fetus is male, the testicles begin to fall off this week.
- Week 23: The size of the fetus is now about the size of a large manga, and the layer of fuzz covering the body of the fetus may become darker, and the fetal movement is increased during this period.
- Week 24: Taste buds are formed on the tongue, and fingerprints and footprints are almost formed.
- Week Twenty Five: The fetus may respond to familiar sounds through motion, and now spends most of its time asleep with a fast movement of the eyes, even though the eyelids are closed.
- Week 26: The lungs begin to manufacture surfactants in the lung, allowing the vesicles to inflate and protect them from sticking together when the air is released.
- Week Twenty-Seven: Represents the end of the second stage of pregnancy, and complement the nervous system growth and maturity, and the body of the fetus is more smooth with the acquisition of more fatty tissue.
The third stage of pregnancy forms the fetus
- Week Twenty-Eight: The eyelids are half-open and show small eyelashes, and the development of the brain at the height of activity as the amount of tissue within the brain.
- Week 29: The fetus begins to gain weight more quickly than before, and brain, lung, and muscle growth processes continue clearly during the week.
- Week 30: The eyes are fully open, and the fetal length is approximately 270 millimeters and its weight is 1300 grams.
- Week 31: At this stage begins to increase height and weight a day clearly, and begins the body of the fetus rid of the layer of fluff covering his skin gradually.
- Week 32: The toenails are now visible, and the length of the fetus reaches 280 millimeters and weighs 1700 grams.
- Week 33: The bones of the fetus become more rigid to support the body, but the bones of the skull remain soft so as to compress at birth slightly to match the size of the birth canal.
- Week 34: The length of the fingernails reaches the end of the finger, and the length of the fetus reaches 300 millimeters and weighs approximately 2100 grams.
- Week 35: The weight of the child increases quickly and the limbs appear full and fat. However, if the child is born during the week, the baby is born early and the child needs specialized medical attention in the hospital.
- Week 36: The fatty layer that covered the body of the fetus, where the fetus swallowed it with other substances, faded to be the greenish black stool that will be released after birth.
- Week 37: This week the fetus is almost full-sized and prepares itself for the birth process by moving its head down toward his mother’s pelvis.
- Week Thirty-Eight: The brain now controls the entire body functions from breathing to heart rate.
- Week 39: There is little left on the end of the journey and it is possible to give birth at any time now with the increase of uterine contractions that bring the body to birth and is called Braxton Hicks Contraction (Braxton Hicks Contraction).
- Week 40: The child is approximately 360 millimeters long and weighs up to 3400 grams. Do not worry if the baby is not born on time. It is an estimated date for when the child reaches the age of forty weeks. It is normal for the baby to be born before or after the scheduled date.