Many expectant mothers want to go to the hospital for prenatal check ups as soon as possible after pregnancy, to check if their baby is healthy and safe through ultrasound. However, they do not know that if they go for ultrasound too early, they will not be able to see their child. So, what is the size of the gestational sac at 42 days of pregnancy?
The gestational sac is the primitive placental tissue, a small embryo surrounded by amniotic membrane and vascular network. The gestational sac is the initial form of pregnancy, when the fetus has not yet formed and the fetal heart is already beating when the embryo appears. A regular menstrual cycle with 42 days of amenorrhea can be observed through ultrasound examination, which shows that the fetus has grown to 0.85 centimeters in length. The fetal head, brain vesicles, frontal and facial organs, respiratory, digestive, and neurological organs have differentiated. The fetal sac is clearly visible on ultrasound, and fetal buds and heartbeat can be seen.
If the ultrasound shows the gestational sac tissue, it is necessary to check the blood HCG and progesterone again. If progesterone is low, it is necessary to supplement progesterone in a timely manner, because progesterone is very important for the development of the embryo in the early stages of pregnancy. Continue to take folic acid to prevent neonatal neural tube defects.
If the gestational sac is not seen on the B-ultrasound at 42 days of pregnancy, there are two possibilities. The first is that the B-ultrasound machine is too old and has poor resolution. The second is that there is no pregnancy at all, and there are many reasons that may cause menstrual delay. In this case, the pregnant mother needs to have blood drawn for HCG testing.
