Ultrasound Video showing an empty Gestational sac in pregnancy of about 6 weeks 2 days.

Описание: This video shows the Empty gestational sac in pregnancy of about 6 weeks 2 days.
An embryo is usually seen within the gestational sac by 6 weeks gestation. One of the more common types of miscarriages, known as an anembryonic pregnancy, empty sac, or blighted ovum, happens when a gestational sac does not contain an embryo. In other words, an embryo failed to develop.
What is a blighted ovum? A blighted ovum is a fertilized egg that implants itself in the uterus but doesn't become an embryo. The placenta and embryonic sac form, but remain empty. There's no growing baby.
Pregnancy or “empty sac” is when the pregnancy stopped growing before the fetus developed. Using the watch-and-wait option, this type of miscarriage will pass on its own only 66 percent of the time, and may take many weeks. Using misoprostol, the tissue passes about 80 percent of the time within one week.
The gestational sac may be recognized as early as 4 weeks and 1 day from the last menstrual period and should always be seen after 4 weeks and 4 days. Its diameter when first seen is about 2 mm and the normal sac increases in size to measure 5–6 mm at 5 weeks.
An empty sac pregnancy may also be referred to as an "anembryonic " pregnancy or a blighted ovum (a term that's considered to be outdated). An empty sac pregnancy is a type of miscarriage, even though the products of conception are still contained in the uterus.
Between 5 ½ to 6 ½ weeks, a fetal pole or even a fetal heartbeat may be detected by vaginal ultrasound. The fetal pole is the first visible sign of a developing embryo. ... If a vaginal ultrasound is done and no fetal pole or cardiac activity is seen, another ultrasound scan should be done in 3-7 days.
A blighted ovum causes about one out of two miscarriages in the first trimester of pregnancy. A miscarriage is when a pregnancy ends on its own within the first 20 weeks. When a woman becomes pregnant, the fertilized egg attaches to the uterine wall. At about five to six weeks of pregnancy, an embryo should be present.
Determining Viability
Using ultrasound, a pregnancy can be declared nonviable based on the following definitive criteria: If a gestational sac without a yolk sac is observed in a scan but, two or more weeks later, there is no embryo with a heartbeat (meaning the pregnancy stopped progressing).
A fetal heartbeat may first be detected by a vaginal ultrasound as early as 5 1/2 to 6 weeks after gestation. That's when a fetal pole, the first visible sign of a developing embryo, can sometimes be seen. But between 6 1/2 to 7 weeks after gestation, a heartbeat can be better assessed.