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Tag: "fertility" at biology news

Soils offer new hope as carbon sink

...uel and agrichar which can be used to enhance soil fertility and store carbon long-term. NSW DPI senior research scientist Dr Lukas Van Zwieten said soils naturally emit about 10 times more greenhouse gas on a global scale than the burning of fossil fuels. "So it is not surprising there is so much intere...

Studies to find better ways to preserve human eggs, ovarian tissue under way

... are faced with the reality that you may die, your fertility is the most important thing you are thinking or talking about, but there are a lot of women interested in talking about it,” says Dr. Emmi. She hopes her work with Dr. Ying C. Song, cryobiologist, will one day give her more to say. They are collec...

AAAS decries latest stem cell veto

...s left over and due to be discarded after in vitro fertility treatments. Current U.S. policy limits such funding to fewer than 20 stem cell lines that had been created when the president first announced U.S. policy in 2001. "Our concern is that this action has the potential to delay development of important...

Row over study puts Korea's scientific community under scrutiny again

...n doctor, Jeong Hwan Kim, against Kwang Yul Cha, a fertility specialist and one of the most powerful players in the country's struggle for biotech supremacy, writes journalist Jonathan Gornall. It is also threatening to disrupt Korea's efforts to recover scientific credibility in the wake of the recent scandal...

Researchers find gene mutation that causes infertility in male mice

...infertility. While most studies on the genetics of fertility stem from analyses of mice that have had a custom ...ct to identify ultimately all the genes needed for fertility in mice and apply this information to the human situation. ...

Early-stage sperm cells created from human bone marrow

...o say if it has potential applications in terms of fertility treatments in humans. Prof Nayernia gained worldwide acclaim in July 2006 when he announced in the journal Developmental Cell that he and colleagues had created sperm cells from mouse embryonic stem cells and used these to fertilise mice eggs, re...

No-scalpel vasectomies by skilled surgeons may speed recovery

... equally effective in terms of providing permanent fertility control. Although the larger study seemed to demonstrate many advantages to the no-scalpel method, the reviewers found the results inconclusive, largely because results from the studies could not be pooled for analysis. "From the results of the re...

Cancer researchers add spice to research against rare neuromuscular disease

...instance, the mice treated with ASC-J9 have normal fertility and are completely healthy sexually, which wouldn't be the case if we simply took away testosterone." ...

Many couples choose to donate surplus embryos for stem cell research

...at, of 400,000 embryos stored at that time in U.S. fertility clinics, less than 3% were available for research purposes. However, that study was primarily designed to quantify the number of frozen embryos via questionnaires sent to couples before or shortly after their IVF cycles. In the current study, the ...

Temple University Hospital investigates treatment for cervical dysplasia

...s effective, it may cause complications related to fertility and childbirth, such as cervical stenosis, pre-term delivery, low birthweight babies, and premature rupture of membranes." Approximately 20 million people, mostly women, are currently infected with HPV, with 6.2 million new infections occurring an...

Underweight women at greater risk of miscarriage

...scarriage appeared to rise by more than 60%, while fertility problems were associated with 41% increased odds. All types of assisted reproduction were associated with increased odds, but the ratios were highest among pregnancies resulting from intrauterine insemination or artificial insemination. Women who ...

Discovery of the first resistance gene to rice yellow mottle virus

... mottling and then tissue death on the leaves. The fertility and development of seeds are affected, which causes considerable yield losses at harvest. Transmission of RYMV occurs by way of insect vectors or by straightforward contact between plants. Prevention measures, like direct sowing or the burying of s...

Heavy smoking cuts women's chance of pregnancy -- even with donated oocytes

Heavy smoking may reduce female fertility by directly affecting the uterus ?making it less r... Human Reproduction. The finding, from a team of fertility experts in Portugal and Spain, comes as a result of comparing the pregnancy rates between non-heavy ...

Scientists crack genetic secrets of human egg

...d human eggs that were obtained from women seeking fertility treatment at a clinic in Santiago, Chile. Women at the clinic must be reproductively healthy, no older than 35, and the cause of infertility must lie within the man. This presented the availability of exceptionally healthy eggs, Cibelli said. All the...

Single molecular 'mark' seen as pivotal for genome compaction in spores and sperm

...or the other. "Compaction might also affect sperm fertility and function in the higher organisms, and thus the propagation of the species," says Thanuja Krishnamoorthy, Ph.D., lead author on the study. "It's vital that we better understand genome compaction during the production of mature sperm." The molecul...

Male chimpanzees prefer mating with old females

...orm long-term mating partnerships, and that female fertility is limited by menopause and, therefore, age. The converse of such an explanation suggests that species that appear to lack long-term pair bonding and menopause (such as chimpanzees) should not exhibit such strong preferences by males for young female...

Embryo tests give parents the choice

MORE than 40 per cent of fertility clinics in the US are allowing couples to choose t...r frozen. The survey, which covered 186 out of 415 fertility clinics in the US, found that around two-thirds of PGD procedures were performed to identify embryos...

Fertility hope as study shows eggs survive in older ovaries

...rch that could have broad implications for women's fertility treatments, scientists have found that despite the...for ovarian stem cell research and help women with fertility conditions," he said. One in six Australian couples faces some form of infertility. Due to the limi...

New technology addresses female fertility preservation

...this work has implications for the preservation of fertility for women and girls with cancer," said Teresa K. Woodruff, Professor of Neurobiology and Physiology who led the study together with Lonnie D. Shea, Associate Professor of Chemical and Biological Engineering. "This system establishes a core technology...

Dominant meerkats render rivals infertile

...nant female benefits in two ways from reducing the fertility of her subordinates. First, her own pups will benefit from not having to compete with additional pups born to a subordinate for the limited number of available caretakers. Second, because subordinate females actually kill other females' pups when pr...

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