Want a Baby? No Hot Baths Please !

...ant smoking history, in contrast to only three occasional smokers in the responder group. No other potential gonadotoxic factors – harmful to the male gonad – were identified. For the purposes of this study, wet heat exposure was defined as the immersion of the body in a hot tub, heated Jacuzzi or ba...

Feedback Loop Governing Ovarian Development Unraveled

...ops derail, cancer and other diseases can arise. "I think our study has indeed important implications that extend beyond understanding of how a gonad such as the ovary develops," explains Dr. Ruth Lehmann, Ph.D., Julius Raynes Professor of Developmental Genetics and Howard Hughes Medical Investigato...

Long-life genes - A new way to combat cancer…

...he worms, causing cells in the animals' gonads to divide rapidly and form germ-line tumors. These tumor cells, when left undisturbed, break out of the gonad and fill the body, killing the worm at around 9 days old age. They then studied the effects of a few different 'longevity' genes in the tumor...

Gonad in Medical Dictionary

Gonad

The gonad is the organ that makes gametes. The gonads in males are the testes and the gonads in females are the ovaries. The product, gametes, are haploid germ cells. For example, spermatozoon and egg cells are gametes. Although medically the gonad term can refer to either male gonads (te...

Testis

...store the normal appearance of the scrotum. ... the controversy that led to testis prostheses. being pulled off the ... The development of such gonad into a testis depends upon the presence of the Y ... However, testis development must only be possible through the interaction of Sry ... Fin...

Hermaphroditism

...E HERMAPHRODITISM and PSEUDOHERMAPHRODITISM. ... Study of a twenty-seven year old man with penoscrotal hypospadias and unilateral undescended gonad who was diagnosed with lateral true hermaphroditism during an ... ... The older term for this condition, hermaphroditism , came from joining...

Gonad in Biological News

Cold Spring Harbor Protocols features organ and cell culture methods

....cellbio.duke.edu/faculty/capel/index.html) provides "Preparing Recombinant gonad Organ Cultures." It can be useful to assay migration between any two adjace...ing development. This protocol assays cell migration between the developing gonad and kidney using tissue recombination, combined with an organ culture techn...

Eliminating germline lengthens fly lifespan, Brown study shows

...ot high, insulin circulation inside their bodies. This suggests that the gonad and the brain are in a synchronized hormonal feedback loop, Tatar said. Its not just the brain affecting the gonad but also the other way around. We think that in mammals, a similar comm...

Evolution is deterministic, not random, biologists conclude from multi-species study

...dy, the research team analyzed more than 40 characteristics of vulva development, including cell death, cell division patterns, and related aspects of gonad development. They plotted the evolution of these traits on a new phylogenetic tree, which illustrates how species are related to one another and provi...

Genetic tug of war determines sexual differentiation

...n the early stages of development in the mammalian gonad before it commits to either a male testis or a fem...f this equilibrium is tipped in favor of Wnt4, the gonad develops into an ovary, while an Fgf9 victory lead...a male. However, during embryonic development, the gonad has the ability to transform either into a testis ...

Study finds how organs monitor themselves during early development

...in the Advance Online issue of the journal Nature. "I think our study has indeed important implications that extend beyond understanding of how a gonad such as the ovary develops," explains Dr. Ruth Lehmann, Ph.D., Julius Raynes Professor of Developmental Genetics and Howard Hughes Medical Investigato...

Olfactory system detects pheromones that control reproduction

...mone (LHRH). LHRH controls the onset of puberty. In females it also stimulates ovulation and controls the estrus cycle. In males, the hormone controls gonad function, including spermatogenesis and testosterone production. "One of the classical dogmas is that LHRH neurons receive inputs from the vomerona...

Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory

...f Moore said: "One of the reasons for doing this research is that it may allow us to investigate the very earliest processes of how a human gamete and gonad (ovary and testis) develops. Many scientists believe that environmental chemical pollutants that mimic the action of hormones (so called endocrine dis...

Gonad in Biological Dictionary

Gonads

... The gonad is the organ that makes gametes. The gonads in... egg cells are gametes. Although medically the gonad term can refer to either male gonads (testicles)...(ovaries), the vernacular, or slang, use of... gonad ( ) n. An organ in animals that produces game...