Yolk dating

You may have a earlier scan, if you are experiencing pain or bleeding for example or unsure of LMP dates.

Transabdominal ultrasound (TAU) and also the transvaginal ultrasound (TVU) are valuable diagnostic tools in obstetrics and gynecology.

The first trimester is months one, two, and three of your pregnancy.

Below are scan pictures taken during the early weeks of pregnancy.

In early pregnancies, the actual cardiac rate is less important than its presence or absence.

The fetal pole grows at a rate of about 1 mm a day, starting at the 6th week of gestational age.

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.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.One gestational sac seen with 2 yolk sacs visible inside it Identical (monozygotic) twins.This results from an early embryo dividing into 2 genetically identical embryos.Measurements taken at these early scans will help to; confirm a pregnancy, date the pregnancy and to see any problems that may occur in the pregnancy ( low lying placenta, twins etc.).