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Tag: "reproductive" at biology news

Scientists use manufacturing methods to reconstruct mastodon

...th, to recover the kinds of information on health, reproductive history, diet and climate that are the focus of a lot of my research. Once the exhibit opening is behind us, I hope to be able to concentrate more on the interpretation of this animal's history and what it can tell us about late Pleistocene events." ...

Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils

...teria or possibly green algae. "The filaments have reproductive characteristics that make us think they are fungi," Xiao said. Taylor said, "Clearly, there are two kinds of organisms living together and, we believe, interacting in more than a chance association." In modern lichens and in the 400-million-year-ol...

Survey reveals women and doctors aren't talking about HPV

... association composed of professionals who provide reproductive health services or education, conduct reproductive health research, or influence reproductive health policy. Founded in 1963, ARHP's mission is to educ...

Stem cells in bone marrow replenish mouse ovaries

...s direct evidence to overturn a long-held dogma in reproductive biology, that female mice generate egg cells only ... "really revolutionizing how we think about female reproductive function," Tilly says. With the help of several genetic markers that are found in germ cells, the m...

Certain fish have a special mating preference

...ait ?similar to a peacock's tail, meant to enhance reproductive opportunity and selected by the female ?rather than a primary sexual trait ?which is the actual reproductive organ itself, simply meant to transfer sperm. Historically, genitalia were not believed to be subjec...

IMF Launches World’s First DNA Database for Myeloma Patients

...ait ?similar to a peacock's tail, meant to enhance reproductive opportunity and selected by the female ?rather than a primary sexual trait ?which is the actual reproductive organ itself, simply meant to transfer sperm. Historically, genitalia were not believed to be subjec...

Scripps research scientists identify infertility molecule

... of the major issues facing women who use assisted reproductive technologies, and nobody has ever considered LPA signaling to be involved in implantation. If the same pathway turns out to be relevant in human embryo implantation, then there might be a way to stimulate LPA signaling with a drug that would increase...

Caloric restriction won't dramatically extend life span in humans: UCLA research

...rodents, the first thing they do is shut off their reproductive system," said Phelan, citing a finding from his dissertation. A normal rodent reaches maturity at one month of age, and begins reproducing its body weight in offspring every month and a half. If humans shut off reproduction by severely limiting calor...

A protein in the eye may prevent immune response and protect eyes from disease

...uding the eyes, brain, gastrointestinal system and reproductive system have the ability to prevent the usual immune response onset when confronted with foreign invaders such as bacteria. Without this special reaction, the eye's delicate tissue would be destroyed by inflammation and the gastrointestinal tract coul...

Tufts researchers shine light on firefly mysteries

...hough males and females both try to maximize their reproductive output and contribute to the next generation, this...ed to the evolution of chemicals produced by their reproductive glands. These chemicals kill the sperm of other males that have mated with the same female but they ...

Drug Offers Alternative to Surgical Treatment After Miscarriage

...d after birth; maternal, child, and family health; reproductive biology and population issues; and medical rehabilitation. The National Institutes of Health (NIH) ?The Nation's Medical Research Agency ?is comprised of 27 Institutes and Centers and is a component of the U. S. Department of Health and Human Servic...

Sleeping Sickness Epidemic Spreading in Uganda

...d after birth; maternal, child, and family health; reproductive biology and population issues; and medical rehabilitation. The National Institutes of Health (NIH) ?The Nation's Medical Research Agency ?is comprised of 27 Institutes and Centers and is a component of the U. S. Department of Health and Human Servic...

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

...tial harmful effects of environmental chemicals on reproductive development," he will say. "But at present it is v...oute for producing sperm and eggs. It would not be reproductive cloning as fertilisation would involve only one set of gametes produced in this way and therefore a ...

Gifts from the sea

...ch was carried out at the MBL, has led to advanced reproductive technologies including test-tube fertilization. Oyster toadfish (Opsanus tau): The broad, flat head of the toadfish contains a unique set of nerve wiring. The nerves leading to and from the toadfish brain are less tangled than those in humans and ot...

Divergent life history shapes gene expression in brains of salmon

...hese fish essentially trade bodily size for faster reproductive maturity," she says. "However, it was unexpected, for instance, that genes associated with learning and memory would be expressed at higher levels in the brains of sneakers. It's not yet clear why disparities like this would arise." Aubin-Horth says...

New Discovery May Help Doctors Treat Infertility

...gen hormones and are present throughout the female reproductive tissues. These new data indicate that this recepto...onment on human health. For more information about reproductive and developmental toxicology and other environmental health topics, please visit our website at http...

Analysis of flower genes reveals the fate of an ancient gene duplication

...n of genes essential for the development of floral reproductive organs, stamens and carpels. The subjects of their...h genes are required for the development of flower reproductive structures, and when these genes are mutated, the plants form so-called double flowers, in which pet...

What comes first…the chicken, the egg, or the bad attitude?

...ores the relationship between the hen's growth and reproductive performance, to improve our understanding of how p...h with their own way of balancing their growth and reproductive priorities. "Building definitions of 'reproductive attitudes' has been an eye-opening process that c...

AACR Favors 'full spectrum of stem cell research biology'

...ogy, including stem cell technology, used in human reproductive cloning, noting that, "such attempts have no beneficial goal and can be reasonably assumed to cause harm." At the same time, the AACR position supports the "ethical use of somatic cell nuclear transfer," noting that the technique, "promises to reveal...

Scientists find a maturity gene in fly

...nile, non-reproductive stage to a mature, sexually reproductive adult," says Thummel, a professor of human genetics at the university and an investigator with the Howard Hughes Medical Institute. "Our kids stay sweet and cute through about 12 years of life and then, suddenly, in response to steroid and thyroid ...

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