Below is an empty gestation sac with no embryo or yolk sac. Note that there is no obvious trophoblastic layer and that the gestation sac is somewhat flattened and pointed.

Below is an empty gestation sac with no embryo or yolk sac. Note that there is no obvious trophoblastic layer and that the gestation sac is somewhat flattened and pointed.

This image shows a normal early gestation. The trophoblastic region surrounding the gestation sac is bright, as expected, and there is a yolk sac. The embryo is not seen but if you did not see this as you scanned through the gestation sac, it would be important to scan again in a week to assess whether the pregnancy had grown and whether you could se a heartbeat, hus confirming that this was a live gestation.

Note that one end of the gestation sac is slightly pointed. This is a sign that is of limited value. It can be seen in normal pregnancies but is more common in a non live pregnancy.

This image shows a normal early gestation. The trophoblastic region surrounding the gestation sac is bright, as expected, and there is a yolk sac. The embryo is not seen but if you did not see this as you scanned through the gestation sac, it would be important to scan again in a week to assess whether the pregnancy had grown and whether you could se a heartbeat, hus confirming that this was a live gestation.

Note that one end of the gestation sac is slightly pointed. This is a sign that is of limited value. It can be seen in normal pregnancies but is more common in a non live pregnancy.

This image shows a gestation sac within the uterus but the wall of the sac is thin and there is no trophoblastic response. There are echoes within the gestation sac, representing blood.

This image shows a gestation sac within the uterus but the wall of the sac is thin and there is no trophoblastic response. There are echoes within the gestation sac, representing blood.

This image shows a gestation sac within the uterus but the wall of the sac is thin and there is no trophoblastic response. There are echoes within the gestation sac, representing blood.

This image shows a gestation sac within the uterus but the wall of the sac is thin and there is no trophoblastic response. There are echoes within the gestation sac, representing blood.

The embryo, gestation sac and chorionic membrane can be clearly seen in this image. However, note the subchorionic haemorrhage.

The embryo, gestation sac and chorionic membrane can be clearly seen in this image. However, note the subchoironic haemorrhage.

The embryo, gestation sac and chorionic membrane can be clearly seen in this image. However, note the subchorionic haemorrhage.

The embryo, gestation sac and chorionic membrane can be clearly seen in this image. However, note the subchorionic haemorrhage.

The embryo, gestation sac and chorionic membrane can be clearly seen in this image. However, note the subchorionic haemorrhage.