Embryonic sac

(Bot.) the vesicle within which the embryo is developed in the ovule; - sometimes called also amnios sac, and embryonal sac.

See also: Embryonic

References in periodicals archive ?
[beta]-hCG value of > 2000 mIU/mL or an embryonic sac size > 3.4 cm should be closely monitored for treatment failure.
According to FORTESCUE & TURNER (2005c), flaws in the embryonic sac caused by chromosome imbalance contribute to increase sterility in edible diploid and triploid bananas.
According to SIMMONDS (1959), Musa sterility would be due to meiotic errors that would lead to errors in the development of the embryonic sac, as well as morphological and physiological alterations that would hinder the penetration of the pollen tube into the style and ovary.
They're more likely to result in a premature rupture of the embryonic sac and suffer from premature delivery.
The court heard the usual signs of pregnancy would include an increase in the thickness of the uterus lining, the presence of an embryonic sac and changes to the appearance of the ovaries.
The court heard that the usual signs of pregnancy would include an increase in the thickness of the uterus lining, the presence of an embryonic sac and changes to the appearance of the ovaries.
But when the scan showed an empty embryonic sac Carol had to have an operation to remove it in January 2003.
It took up to 72 hours for the young to emerge from the embryonic sacs. Relative litter mass (percentage of litter weight compared to weight of the female post birthing) was up to 97%.
At Central Cafe (above), fans are abuzz over Lola wines produced by owner Mark Cripe's brother, Seth, in California and jalapeno pizza ($12), with pesto sauce, mozzarella and bottarga (a delicacy made by curing embryonic sacs of mullet, roe, now produced in Cortez by Seth).
argentinum, all dissociated embryonic sacs carried out monthly in both populations, no case showed dead embryos with or without shell in the inner sacs, and no residual body that would lead to think of a situation of that kind.