Why Was No Gestational Sac Found on the Ultrasound Scan?
Failure to detect the gestational sac in an ultrasound B examination may be due to the early stage of pregnancy, when the gestational sac is too small or has not yet reached the uterus. It could also be a case of ectopic pregnancy, where the gestational sac does not implant in the uterus but rather in other locations outside the uterus. Females usually discover the gestational sac within the uterus around five weeks of pregnancy, and it can be detected by ultrasound B once the hCG level continues to rise.
1. After pregnancy, the gestational sac can be seen via transvaginal ultrasound B as early as the 5th week, while abdominal ultrasound B is slightly later. As everyone's menstrual cycle differs, the time of conception also varies. Therefore, the earliest time to see the gestational sac in an ultrasound B examination also differs. For women with a normal menstrual cycle, the gestational sac can usually be detected in the uterine cavity via ultrasound B around 42 days after menstruation stops.
2. If the blood test value is around 1500~2000 and the B-ultrasound examination fails to detect the gestational sac, it could be a case of ectopic pregnancy. If the blood test reveals a decline in the HCG level, and the B-ultrasound examination does not find the gestational sac, it could indicate an imminent miscarriage.
3. It is essential to undergo a B-ultrasound examination after pregnancy. Through B-ultrasound, it can be determined whether the pregnancy is intrauterine or ectopic. At the same time, various parts of the fetus, such as the fetal head size, fetal buttock length, and a clear display of the fetus's skull, trunk, heart, lungs, liver, spleen, stomach, kidneys, bladder, and other organs, as well as the bones of the limbs, can be measured. This allows for understanding the growth and development of the fetus at different stages.
