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Calendar pregnancy / 4 week pregnancy


If You have unexplained irritability, increased fatigue, breast swelling or unusual sensitivity nipple means yellow body in Your ovary is working tirelessly. Therefore, You are pregnant.

However, it should be noted that such changes in health can to appear shortly before the next menstruation. So pregnancy is or not? Fortunately, there is a way to answer this question.

This week in Your body there is a new hormone - human chorionic gonadotropin. To detect it in the urine help special test systems, which are sold in chemist shops without a prescription. To spend at home, this test is easy, you just follow the attached instructions. And if the test was positive - it is likely that You are pregnant.

Although in fairness it should be noted that to perform this test better still, next week, when the level of human chorionic gonadotropin will be higher.

Recommendations to the 1st week continue to be relevant.

Remember that the first 12 weeks are the most responsible, critical period in the development of Your unborn baby. No possibility of a mistake errors are very expensive. If You have any questions - contact the expert!

Future child

What's happening this week is extremely important for the fetus.

At this time actively developing the so-called Nazaraliev bodies.

Their three - chorion, amnion and yolk SAC. Probably these names is not enough about what You say.

But without these "modest", unknown to the broad public bodies no further development of the baby. That is why nature has taken a whole week on their emergency Assembly, while reducing the rate of development of cells the embryo.

If to speak very briefly about the tasks performed vasarhelyi authorities, it is nutrition, respiration, biochemical support and comprehensive protection of Your baby. Rorion later turns into the placenta (see below), and the amnion is in the fetal bladder, we will also discuss later.

Interestingly, on the creation of these bodies paternal genes work more active than the parent. The age-old task of men is to provide life and protect those for whom he is responsible, is seen even at the the genetic level (figuratively speaking, sperm "behaves as real man", although it represents only one the cage of the male body).

As for the Your baby - now he reminds flat the disk is composed of several layers. Each layer is destined to become the progenitor of the different organs and tissues.

But all of this is in the near future.

Figure the left shows what it looks like the embryo in the early weeks, and drawing on the right reflects the incident for 6 -7 days of the change. Your baby is the vertical blue bar. It's hard to imagine that after 9 months it will be a man, don't you?

Source of illustrations: Embryo Development

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