ovary

(redirected from female gonad)
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Words related to ovary

the organ that bears the ovules of a flower

(vertebrates) one of usually two organs that produce ova and secrete estrogen and progesterone

References in periodicals archive ?
On the other hand, the presence of hermaphrodite scallops developing only or mostly a female gonad might be the result of inheriting the two X-chromosomes from the nondisjunction (XXX), as well as possibly from random mutations in other key-genes involved in the sex-determination cascade.
Serial sections of female gonads were used to analyze the relative density of ovarian structures.
For example, in humans signs of sexual dimorphism in the male appear at 6 weeks of gestation, whereas the female gonad resembles the indifferent gonad until the sixth month of pregnancy.
In his De Mulierum Organis Generatione Inservientibus, De Graaf provided the first thorough description of the female gonad and established that it produced the ovum.
At the beginning, female gonad development was minimal in all treatments with high frequency of inactive (50%) and spent (25%) mussels (Fig.
We found that these variations of gonad serotonin concentration (ng/g) are observed in both male and female gonads and that for each gonadal stage serotonin concentrations were not significantly different between males and females.
The female gonad first appears as an off-white and translucent band of tissue that begins to extend slightly outward from the digestive gland, accumulating mass as follicles thicken and oogonia develop into primary previtellogenic oocytes (<10 [micro]m) along the germinal epithelium (Fig.
There was a weak, but insignificant, correlation between the total heavy metal concentrations in sediments and the sums of mean female gonad lesions (r = 0.
The protruding externa is the only externally visible part of the parasite and is its reproductive component; when young, it contains the female gonad and two empty sperm sacs.
Photomicrograph of a histological section of (A) indeterminate, (B) developing, (C) ripe, and (D) spawning stages of a female gonad in Anudara granosa.
Percent agreement between macroscopic and microscopic female gonad stages was calculated to evaluate the accuracy of macroscopic staging (used in all previous studies of tautog reproductive biology).
For some experiments, gonad collecting tubules (with adjacent connective tissue) were dissected manually from the ripe male or female gonad and the excised tissue was microscopically examined to definitively determine the absence of gametes (spermatozoa or oocytes) in the tubule lumen.
Exposure of a monosex population of male carp to 17[beta]-estradiol (10 [micro]g/L) for 90 days resulted in phenotypic female gonad containing oviduct and oocytes (10), and in Japanese medaka (Oryzias latipes), exposure to 17[beta]-estradiol (1 [micro]g/L) for 90 days beginning 1 DPH resulted in complete feminization (30).
The male gonad is smaller than the female gonad, therefore the male fish requires less stored energy for gonadal development and it may start to mature earlier than females.