After ovulation, the collapsed follicle assumes a cuplike shape and becomes a glandular corpus luteum (Pl.
In the single instance in which an extra corpus luteum was found, one egg had probably been laid before the specimen was captured.
This corpus luteum grows in size until it sometimes occupies as much as one-third of the ovary.
The corpus luteum of the non-pregnant woman, that is, the one following menstruation, is called false corpus luteum; the corpus luteum following pregnancy is called a true corpus luteum.
The corpus luteum acts like a gland and elaborates a secretion which has an influence on the circulation in the uterus and on menstruation.
The corpus luteum of the pregnant woman keeps on increasing until the end of the second month, remains about the same size until the end of the sixth month, and only then begins gradually to diminish.
This process can be interrupted by destroying the corpus luteum artificially.
This author showed that the corpus luteum of the ovary gives off a substance to the blood which alters the tissues in the uterus in such a way that contact with any foreign body induces this deciduoma formation.
In normal single pregnancies in cattle there is never more than one corpus luteum present.
The action of the substance of the corpus luteum is independent of the nervous system, since in a uterus which has been cut out and retransplanted the same phenomenon can be observed.
I believe no one ever found a foetus in utero without a corpus luteum in the ovary; and that the truth of Haller's carollary, 'nullus unquam conceptus est absque corpore luteo' remains undisputed.
Upon slitting the ovarium at this part, the corpus luteum appears a round body, of a very distinct nature from the rest of the ovarium.
To a similar cause we may also attribute the lobular appearance, which the structure of the corpus luteumpresents when a section is made of it.
Illustration: Corpus luteumat the end of the ninth month.
When pregnancy is over, the corpus luteum gradually diminishes and disappears.
After awhile the cavity of the corpus luteum contracts, and the opening into it closes.
In some of these cases there were two distinct corpora lutea in one ovarium, in others there was a distinct corpus luteum in each ovarium.
Leptoglossum is from two Greek words, meaning thin, delicate, and tongue; luteum means yellowish.
What seems to happen in fact, is this: the corpus luteum secretion stimulates the dormant cells of the mammary glands, formed during puberty, but latent until the advent of pregnancy.
The true corpus luteumresembles closely the adrenal cortex in make-up and staining reactions.
Besides, the corpus luteumstimulates the thyroid to prepare for the heavy demands to be made upon it during pregnancy.
With the prolonged activity of the corpus luteum during pregnancy, prolonged stimulation of the breasts occurs.
It has been claimed that the secretion of the corpus luteum is necessary for the complete progress of a pregnancy.
Moreover, the hypertrophied follicular cells which constitute the corpus luteum secrete fat which is seen in them in globules.
Chemical investigation shows that the lutein of the corpus luteum is almost if not quite identical with the colouring matter of the yolk in birds and reptiles.
When pregnancy does not occur the corpus luteum is formed, but begins to diminish within ten or twelve days in the human species and is then gradually absorbed.
It is remarkable that in the results quoted by Marshall a well-developed corpus luteum was found and exclusively found in the lower Vertebrates which are viviparous.
Marshall himself examined sections of the corpus luteum of Ornithorhynchus and saw much hypertrophied and apparently fully developed luteal cells, but no trace of any ingrowth from the wall of the follicle.
It would be interesting to know how long the rudimentary corpus luteum persists in Ornithorhynchus: the period, according to my views, should be very short.
The ovum being no longer present in the ovary, the secretions would remain in the follicular cells, and the corpus luteum would be explained.
In the corpus luteum the lutein is contained in the cells, not in a blood-clot.
When fertilisation occurs the corpus luteum increases in size during the first part of the period of gestation (four months, or nearly a half of the whole period in the human species).
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "luteum" in a variety of sentences. We hope that you will now be able to make sentences using this word.
