Pregnancy week after week: 5th week of pregnancy

Pregnancy week after week: 5th week of pregnancy

During the 5th week of pregnancy, the nerve and vascular system are formed, and the placental circulation nourishes the embryo. At the same time, the expectant mother begins to find she is pregnant.

5th week of pregnancy = Start of organ development

During the 5th week of pregnancy, the last germline, the mesoderm, which is between the entoderm and the ectoderm, arises. From the mesoderm, the entire musculoskeletal system - the skeleton, the muscles and also the kidneys, the heart, and the vascular system - develop over time. Thus the development of three-layer embryo ends and the period of organogenesis, i.e. organ formation, begins.

Creation of the baby's nervous system

The first is the nervous and vascular system. The brain and spinal cord develop from a cell-lining, the so-called nerve discs, which then forms a groove that closes to create a nerve tube. In the front of the tube, it swells and forms the base of the brain, while the slimmer rear end is the base of the spinal cord. Further development of the brain and gradual formation of its parts will be described at week 6.

5th week of pregnancy and heart

The basis of the vascular system is so-called blood islands, small clusters of cells that are transformed into primitive blood cells and the lining of blood vessels. These are blood sacs that connect to the natural arteries and veins to form early blood circulation. Heart buzzes the 21st day since fertilization until then we will not see it on an ultrasound. Together with blood circulation, the placenta and umbilical cord began to function adequately, actively nourishing the fetus and exhausting the fabric of metabolic transformation.

How a baby looks at week 5

At week 5, the baby is about 1-2 mm in size and has an elongated shape with a broader head section that contains the base of the brain. At this stage, the fetus is very similar to that of other vertebrates.

Symptoms of pregnancy at five weeks may be breast pain

In the case of a regular cycle, it is already a week that you should start the expected menstrual period and still do not get there. Maybe you've had a pregnancy test that came out positively; perhaps you're still waiting. But now you may experience signs of pregnancy. These include mood swings and hypersensitivity, increased breast tension, abdominal fullness, fatigue, fainting sensations and known morning sickness. But they appear later.

Confirmation of pregnancy

The most natural method that most women choose to initially is to determine urinary pregnancy using a pregnancy test commonly available in pharmacies and drugstores. The second option is a blood test, which is preceded by a doctor's visit and blood collection. The hormone can be found in the blood 8 - 9 days after fertilization. During the 5th week of pregnancy, the fetus can also be detected by ultrasound.

Urine pregnancy test

It works on the principle of detection of hCG, human chorionic gonadotrophin, which is produced by the base of the placenta. In urine, we can find it in nesting eggs, so it makes no sense to do the test earlier than at the date of the expected menstrual period, preferably up to a week after. It can only be reliable and conclusive.

The best test is to perform the morning when the urine is most concentrated and proceed according to the enclosed instructions. The hCG level doubles every 2-3 days from fertilization, so it is better to repeat the test. It may happen that one day the test will be negative and 1-2 days later positive.

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