The paucity of myometrium around the gestational sac is diagnostic, while, in contrast, the angular pregnancy has at least 5 mm of myometrium on all of its sides.
12.
With obstetric ultrasonography the gestational sac sometimes can be visualized as early as four and a half weeks of embryo can be observed and measured by about five and a half weeks.
13.
"You are able to determine that you have in fact terminated the pregnancy, because you can see the gestational sac, " said Vicki A . Saporta, executive director of the National Abortion Federation, which represents abortion providers.
14.
Women seeking an abortion with RU-486 go to a physician's office where they swallow one to three pills of Mifepristone, which block progesterone receptors necessary for sustaining a pregnancy, causing the gestational sac to detach from the wall of the uterus.
15.
An anembryonic pregnancy ( also called an " empty sac " or " blighted ovum " ) is a condition where the gestational sac develops normally, while the embryonic part of the pregnancy is either absent or stops growing very early.
16.
The yolk sac and embryo should be readily identifiable when the gestational sac reaches a certain size a yolk sac should be seen when the gestational sac is 20mm and a fetal pole should be seen when the gestational sac reaches 25mm.
17.
The yolk sac and embryo should be readily identifiable when the gestational sac reaches a certain size a yolk sac should be seen when the gestational sac is 20mm and a fetal pole should be seen when the gestational sac reaches 25mm.
18.
The yolk sac and embryo should be readily identifiable when the gestational sac reaches a certain size a yolk sac should be seen when the gestational sac is 20mm and a fetal pole should be seen when the gestational sac reaches 25mm.
19.
Then, while the woman waited in a tan reclining chair in the recovery room, those contents were floated in a petri dish in the lab and inspected to find the gestational sac, a tiny pale clump of tissue, identifiable by the jagged edges of the villi.
20.
What has made the new technique possible is a combination of better ultrasound imaging that shows the gestational sac in its earliest stages, and more sensitive pregnancy tests, some of which can now detect pregnancy as soon as the embryo is implanted in the womb, a week to 10 days after fertilization.
