The calculation of the diameter of the gestational sac refers to the relationship between the size of the gestational sac and the week of pregnancy. When an ultrasound is done, the size of the gestational sac is mainly measured by the three diameters of the gestational sac, and the average of the three diameters plus 25 is the number of days of menopause.
At 5 weeks of pregnancy, the gestational sac can be seen in the uterine cavity by ultrasound. At around 6 weeks of pregnancy, the diameter of the gestational sac is basically between about 2 centimeters, and at around 7 weeks of pregnancy, the diameter of the gestational sac is basically between 2.5 and 3 centimeters. If the above values are met, the embryo is generally considered to be developing normally. Folic acid should be taken in early pregnancy.
In addition to the diameter of the gestational sac, it is also based on the specific location of the gestational sac, which is normally located in the uterine fundus, anterior wall, and lateral wall.
Patients in the middle of pregnancy must go to the hospital regularly for ultrasound testing and take folic acid under the guidance of the doctor.