7 midwifery pregnancy week

The gestation period is measured in weeks, but weeks can be gestational (that is, counted from conception) and obstetric (that is, counted from the date of the last monthly). Measuring the gestation period in obstetric weeks is a preferred and common practice, since it is almost impossible to accurately determine the date of conception. For example, 7 maternity week of pregnancy can correspond to 5 weeks from conception (if the fertilization of the egg occurred on the 2-3 week of the cycle), and 4 weeks from conception (if conception occurred near the end of the cycle).

7 obstetric weeks is one of the critical periods of pregnancy, because at this time the yellow body can no longer cope with its functions of supporting pregnancy and passes its functions to the placenta. However, the placenta is not always ready for such a responsibility, because of what can happen a spontaneous miscarriage. If a woman has a 7 midwifery pregnancy week, the symptoms of a miscarriage should not only alert her, but get her to see a doctor immediately. Such symptoms may include:

Embryo in 7 obstetric weeks

At the end of 7 weeks the baby can already be called a fetus, since the embryonic period of its development is considered complete. While the baby does not have an endocrine and nervous system, the brain is already forming. Otherwise, he is a bit like a man, both externally and internally. Gills that were present at earlier stages of development, almost disappeared, but a small tail is still present. The fruit straightens a little, the place where there will be his neck becomes visible. The limbs are clearly visible, but the fingers are not divided yet. The pens grow slightly faster than the legs.

The little face of the baby is decorated, the mouth and nostrils are noticeable, the jaws begin to form. At the end of this period of pregnancy, he will have a sexual lump, from which later the sexual organs will form. Now it is impossible to determine the gender of the child, but in genes this is predetermined.

7 weeks of pregnancy (obstetric period) means that the baby in length can be from 5 to 13 millimeters, and its weight can reach 8 grams. At the end of the 7th week between the uterus and the placenta, blood circulation is formed, that is, the blood of the mother and the child is connected. This is necessary so that the child can eat and breathe. A utero-placental barrier is also established, which prevents toxic substances and dangerous microorganisms from reaching the baby.

HCG analysis at week 7

The analysis of the level of human chorionic gonadotropin (hCG) at the 7th obstetric week allows to determine whether the fetus is developing properly. In 6-7 obstetric weeks of pregnancy, the level of this hormone can vary from 2560 to 82,300 mIU / ml. At 7-8 weeks of obstetric pregnancy, hCG should be between 23,100 and 151,000 mIU / mL. This difference between the upper and lower threshold in each period is due to the fact that the time of fertilization of the egg and attachment to the embryo's uterus can be different. It should be remembered that the production of HCG begins precisely from the moment of implantation.

7 obstetric pregnancy week: sensations

The 7th obstetric pregnancy week will be remembered by the coming mother with the arrival of toxicosis, drowsiness, lethargy. All organs and systems begin to rebuild, they may be troubled by frequent headaches, anxiety or, conversely, emotional tides may occur.

The obstetric period of 7 weeks is the time to undergo the first ultrasound examination, on which the baby's heartbeat can be fixed. You can also hand over the gynecologist-appointed tests to register for pregnancy.