First week of dating
Transvaginal ultrasound, by contrast, can detect pregnancies earlier, at approximately 4 to 5 weeks gestation.Prompt diagnosis made possible by transvaginal ultrasound can, therefore, result in earlier treatment.At 4 weeks and 3 days, a tiny gestational sac becomes visible within the decidua.
Below are scan pictures taken during the early weeks of pregnancy.
Transabdominal ultrasound will provide a panoramic view of the abdomen and pelvis and is noninvasive, whereas transvaginal ultrasound provides a more limited pelvic view and requires insertion of a probe into the vagina.
Transabdominal ultrasound cannot reliably diagnose pregnancies that are less than 6 weeks gestation.
While your sonographer takes measurments they will explain what you are looking at.
It may not be easy for you to make out what you are seeing on the screen in the early scans.