Which is more accurate, blood test or ultrasound?

If women's menstruation is delayed for several days, they should consider the factor of pregnancy. If they want to know whether they are pregnant, the easiest way is to use a pregnancy test stick. The pregnancy test stick is very convenient to use and the test results are very accurate, but this can only serve as a preliminary test. If you want to further understand whether the pregnancy is normal, you must go to the hospital for examination. The most popular examination method is B-ultrasound. In addition, blood test can also be done. Which one is more accurate, blood test or B-ultrasound?

Which is more accurate, blood test or ultrasound?

If the pregnancy is relatively short, a blood test for human chorionic gonadotropin is accurate. If the pregnancy is short, the gestational sac may not be visible on ultrasound. An ultrasound examination should be done at least six weeks into the pregnancy to allow the gestational sac to be seen more clearly. In this case, it is best to go to the hospital to have a blood test for chorionic gonadotropin. Blood test is the most accurate way to detect pregnancy early.

Generally, a blood hcg test can be done to confirm pregnancy after a missed period. Ultrasound can detect pregnancy relatively late, usually about 40 days after the menstruation has stopped, before the gestational sac can be seen on the ultrasound. If you are not pregnant, you can take progesterone orally, do not stay up late, exercise appropriately, and do not need to check if it is abnormal occasionally. If you are obese, you should lose weight appropriately. Excessive obesity will affect ovarian function.

It is impossible to determine whether the gestational sac-like echo is a gestational sac, and a weakly positive urine test cannot determine whether there is an intrauterine pregnancy. It is recommended to follow the doctor's advice and repeat the urine test in two days. If the urine test or blood HCG level is elevated, then there is a high possibility of intrauterine pregnancy. It cannot be simply judged which one is more diagnostic, and both need to be checked.

Judging from the results of the color Doppler ultrasound examination, it is considered to be an intrauterine pregnancy. You can do another blood hcg test to check the current development of the gestational sac. During this period, you should pay more attention to rest, avoid overwork, and don't do strenuous exercise. You must not have sex and cannot eat spicy, irritating, raw or cold food. Prevent constipation or diarrhea.

Blood tests are generally more accurate. If HCG doubles every other day, it indicates an intrauterine pregnancy, but if it grows slowly or decreases instead of increasing, it indicates an ectopic pregnancy.

From the perspective of eugenics, it does have a certain impact, but it will not necessarily lead to deformities. Don't worry too much.

Suggestions: In this case, strict pregnancy checkups should be carried out, including Down syndrome screening at 14-19 weeks of pregnancy, four-dimensional color Doppler ultrasound for prenatal screening at 22-26 weeks of pregnancy, and if necessary, amniocentesis and umbilical cord blood analysis at 16-20 weeks of pregnancy. This will clarify the baby's development in the womb. It is recommended to keep the baby and do regular pregnancy checkups. If the baby is found to be abnormal, terminate the pregnancy in time.