ova


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

ova

 [o´vah] (L.)
plural of ovum.

o·va

(ō'vă),
Plural of ovum.
[L.]

ova

(o´vah) plural of ovum.

ova

(ō′və)
n.
Plural of ovum.

ova

See ovum.

ova

Plural of ovum.

o·va

(ō'vă)
Plural of ovum.
[L.]

ovum

(o'vum) plural.ova [L., egg]
1. The female reproductive or germ cell.
2. A cell that is capable of developing into a new organism of the same species. Usually fertilization by a spermatozoon is necessary, although in some lower animals ova develop without fertilization (parthenogenesis). See: conception; fertilization; menstrual cycle; menstruation

alecithal ovum

An ovum with a small yolk portion that is distributed throughout the protoplasm. Synonym: isolecithal ovum

centrolecithal ovum

An ovum having a large central food yolk, as in a bird's egg.

holoblastic ovum

An ovum that undergoes complete cleavage, as opposed to partial or meroblastic cleavage.
Enlarge picture
HUMAN OVUM

human ovum

The female gamete, required for reproduction. The ovum develops from an oogonium within the graafian follicle of the ovary and matures through the meiotic process of oogenesis. A mature ovum is about 0.13 to 0.14 mm (0.0051 to 0.0055 in) in diameter. At ovulation, the ovum is bounded by a translucent cellular membrane (the zona pellucida), which is connected to a layer of follicular cells (the corona radiata); these cells enclose the cytoplasm, nuclei, and chromatin material. The exact time during which a human ovum is capable of fertilization and further development before degenerating is not known; however, it is probably 24 hr. See: illustration; oogenesis; ovulation

isolecithal ovum

Alecithal ovum.

mature ovum

A secondary oocyte that has completed its second meiotic division as a result of contact with a sperm. The nucleus of the mature ovum becomes the female pronucleus.

meroblastic ovum

An ovum in which only the protoplasmic region undergoes cleavage, characteristic in ova containing a large amount of yolk.

permanent ovum

An ovum ready for fertilization.

primordial ovum

A germ cell that arises very early in the development of the embryo, usually in the yolk sac endoderm, migrates into the urogenital ridge, and is the precursor for the functional gamete.

telolecithal ovum

An ovum in which the yolk is fairly abundant and tends to concentrate in one hemisphere.

Ova

Eggs.
Mentioned in: Stool O & P Test

ova

plural of ovum.

Patient discussion about ova

Q. Is there any difference between brown eggs and white eggs? My fitness instructor suggested me to have brown eggs instead of white eggs so is there any difference between brown eggs and white eggs?

A. I have to agree with you. Never heard of any difference between the two and it doesnt sound reasonable that one is better to your health than the other...

Q. why the renal doctor told my husband that he needs to eat a dozen of egg a week for protein,how it will help? it won`t afect his cholesterol,also i would like to know what role the protein plays on his treatment and what other foot its rich in protein that he can can take,without causing problems to his health.

A. if i understand correctly, your husband is diabetic. like my grandfather he probably developed a "Diabetic nephropathy" which is a long name to: kidney being destroyed because of blood vessels clotted by diabetes. because of that destruction the kidneys allow protein to go out in the urine. this is a dangerous situation,a protein in the name of "albomin" helps our blood to hold fluids in blood vessels. without it fluid will leave the blood and go to our organs. not a good situation. so he needs a lot of proteins.
here is a list of a 100 protein rich foods:
http://smarterfitter.com/blog/2007/10/28/100-most-protein-rich-vegetarian-foods/

Q. How can I catch Salmonella? Yesterday I ate a mousse which was made from raw eggs. Could I have caught Salmonella?

A. Salmonella infections usually resolve in 5-7 days and often do not require treatment unless the patient becomes severely dehydrated or the infection spreads from the intestines. Persons with severe diarrhea may require rehydration, often with intravenous fluids (IV). Antibiotics are not usually necessary unless the infection spreads from the intestines.

More discussions about ova
References in periodicals archive ?
No antigen sensitization was conducted in these studies, whereas we utilized OVA for sensitization.
Reproduction biology of select crayfish species including information on chronology of appearance, ova size, and instar development.
Netsu foresees troubles if the melted ova turn out to be useless.
In December 2005 I flew to Chicago, underwent general anesthesia, endured a minor medical procedure, and sold 12 ova to a pair of strangers for $10,000.
Exposure to CAPs alone or after sensitization with OVA produced significant changes in NE concentrations in the PVN (Figure 1).
The Justice Ministry said Tuesday it will ask an advisory panel to the justice minister to consider how to revise the civil law to confirm the parentage of babies born under fertility treatment using sperm or ova provided by close relatives.
announced that it entered into an agreement to acquire Trans Ova Genetics LC, who provides bovine reproductive technologies.
Therefore, in OVA-sensitized rats, oral challenges were performed by intragastric intubation 10 days after the oral sensitization period of 42 days, with doses of OVA varying between 10 and 100 mg.
If the pills were used at full strength not many ova would be released but the side effects would be intolerable; and so they are used in a highly diluted form, in which case ova are sometimes released.