In this article we will tell you about the features of the growth of the fetal egg and about what size this body should have for the weeks of pregnancy, and also give a table with which the changes can be visually traced.
Table of the size of the fetal egg by the weeks of pregnancy
In the normal course of the gestation period of the baby, the size of the fetal egg grows constantly and approximately corresponds to the following indices:
- up to 4-5 weeks, the internal diameter of the fetal egg is approximately 4 mm;
- for a period of 5-6 weeks, the internal diameter of this body reaches 6 mm, and after 3 days a jump in its growth to 7 mm occurs;
- starting from 6 weeks, the size of the fetal egg increases even more significantly. On average, during this period its diameter is about 11-15 mm, but in some situations it can reach 18 mm;
- for a period of 7-8 weeks, the value of this indicator is about 20-25 mm;
- about 8-9 weeks of pregnancy - 28-33 mm;
- 9-10 weeks - approximately 34-42 mm.
By the end of 10 weeks, the size of the fetal egg in most cases reaches 5 cm, and after this period it continues to increase by 1-2.5 mm every 24 hours.
More detailed information on the normal rates of increase in the size of the fetal egg will be helped by the following table:
Can I determine the length of pregnancy by the size of the fetal egg?
The shape and size of the fetal egg, as well as the presence of the embryo in it, must be determined during the planned ultrasound examination. Pay attention to all these indicators is extremely important, because they can indicate both the normal development of the future baby, and the presence of serious and dangerous violations.
Often, using the above table, doctors determine the gestational age by the size of the fetal egg. In fact, this method can not give an exact answer to the question, when the conception occurred, because the internal diameter of the fetal egg is highly variable. On average, the error of this method of determining the gestational age is about 1.5-2 weeks.
That is why to determine the exact period of the waiting period of the baby, not only this indicator is used, but also some others, in particular, the coccyx-parietal size of the embryo. In addition, when determining the number of weeks according to the table based on the size of the fetal egg, also take into account the level of hCG in the blood of the future mother.