The second week of pregnancy - when raging hormones
second week of pregnancy begins with hormonal changes.These changes allow for a pregnancy test.So the second week of a woman can already confirm their pregnancy and seek the advice of an obstetrician-gynecologist - not worth it to pull.
Hormonal changes in women in the second week of pregnancy
After the introduction of a fertilized egg in the uterus in the second week of pregnancy in the blood and urine of women appears human chorionic gonadotropin (hCG), which is also called the pregnancy hormone.
hCG begins to be produced after the introduction of the embryo in the uterine lining.It highlights the chorion - the outer shell of the embryo with naps, which firmly implanted in the uterine wall.
hCG stimulates the corpus luteum - cancer, which was formed in the ovary in place bursting of the follicle after ovulation.And since the main hormone secreted by the corpus luteum - progesterone Progesterone - norm and pathology , then the amount of blood increases significantly.This progesterone helps prepare the uterus to receive the embryo, its proper implementation in the lining of the uterus, the development of the embryo in the uterus during the first weeks of pregnancy.Progesterone also inhibits the contraction of the muscles of the uterus, thereby preventing the premature termination of pregnancy.
In the second week of pregnancy the amount of hCG in the blood and urine of pregnant women even slightly, it can be detected only by means of a very sensitive test, but then itIt is doubling every two days.Starting from the 10th week of pregnancy hCG growth stops and the 12th week is winding down.This suggests that the yellow body ceases to function, and all the work to ensure that the body of a pregnant woman's hormones incurs formed placenta.
human chorionic gonadotropin - is one of the most important indicators of the presence of pregnancy and its successful development.HCG is composed of two substances - alpha and beta.The substance is identical alpha same substance pituitary hormones (follicle - FSH, LH - LH and thyroid stimulating - TSH), the substance beta characteristic only of hCG.
If HCG appears in the blood of non-pregnant women and men, this may indicate the presence of the organism in their hormone-dependent tumors or cysts.
Changes in a woman's body in the second week of pregnancy
In the second week of pregnancy under the influence of hormones in women may be nausea Nausea - there may be problems with the nervous system , drowsiness, increased appetite, increased and painfulmammary glands.
In the second week of pregnancy the fetus is in the uterus.After implantation of a fertilized egg in the womb of its mucous membrane begins to change.It further expand arteries and appear large decidual cells, rich in glycogen (glycogen - a glucose reserves Glucose: The energy source , essential for energy production).
shell surrounding the fetus, some time is saved and through it from the uterus to the embryo enters the protein liquid that surrounds the fetus.The cells of the embryo are heterogeneous, they are divided into blastomeres surface, giving rise to trophoblast (from it in the future placenta is formed), and lying within the larger blastomeres - embryoblast (from it formed the body of the fetus).
trophoblast plays a major role in the implementation process of the embryo to the uterus.Trophoblast cells secrete enzymes that destroy the uterine epithelium, which allows the embryo penetrate deeply into the uterine lining.In the place of introduction to the end of the second week of pregnancy forms chorion - the outer shell of the fetus, covered villi grow into the uterine lining and participating in the formation of the placenta.
Cells embryo in the uterus are divided, and by the end of the second week of pregnancy the embryo consists of two unequal largest bubbles, which in one place in contact with each other, forming a so-called embryonic shield, which later will form the body of the embryo itself.Smaller bubbles facing the uterine wall, called ectodermal or amniotic vesicle therefrom further formed placenta and fetal membranes.The larger the bubble called the endoderm - of which formed the body of the fetus.
home pregnancy test
pregnancy test involves identifying the urine of pregnant women hCG.Tests can be different, both in method of and efficiency.The most simple tests determine the presence in urine of the total amount of hCG (alpha and beta-substances).Tests are considered to be more efficient, which is determined by the presence in urine of beta-hCG substance.The packaging test usually indicates its sensitivity (this figure from 10 to 30, corresponding to the minimum concentration of hCG in urine, which can be determined by this test; the smaller the number, the more sensitive test).Tests with a sensitivity of 10 can be used within a week after ovulation Ovulation - How to determine as accurately as possible? , that is, in the second week of pregnancy.
Pregnancy - this is a very important time, especially the first few weeks, when there is a bookmark of organs and tissues of the fetus.Try not to hurt her baby at the time: do not smoke, do not drink alcohol and drugs, get plenty of rest, and walk in the fresh air.