Tag: "ovaries" at biology news
Even when faint, ovary scent draws sperm cells
...rstanding why, how and when sperm are attracted to ovaries
may help scientists understand problems with human conception. "Defects in sperm chemotaxis may be a cause of infertility, and consequently, sperm chemotaxis could potentially be used as a diagnostic tool to determine sperm quality or as a therapeut...
Study finds that a woman's chances of having twins can be modified by diet
...nimal's milk. IGF increases the sensitivity of the ovaries
to follicle stimulating hormone, thereby increasing ovulation. Some studies also suggest that IGF may help embryos survive in the early stages of development. The concentration of IGF in the blood is about 13 percent lower in vegan women than in wome...
Cancer-reducing benefits of preventive surgery may be specific to gene mutation
...st to suggest that the prophylactic removal of the ovaries
and fallopian tubes may provide a different benefi...c mutation. Of this group, 561 opted to have their ovaries
and fallopian tubes surgically removed -- a procedure called risk-reducing salpingo-oophorectomy -- ...
Breast-sparing surgery an option for women with breast cancer gene mutation, U-M-led study finds
...that women with the genetic mutation who had their ovaries
removed or took the anti-estrogen drug tamoxifen h...ns, those who were further treated by having their ovaries
removed, a procedure called oophorectomy, were less likely to have a recurrence. Similarly, tamoxife...
Joslin study refutes recent report that bone marrow can replenish female oocytes
...ells were capable of generating new oocytes in the ovaries
of recipient mice. The Joslin study will appear in...ells from the bone marrow or blood could enter the ovaries
of genetically infertile or chemically sterilized female mice and produce new oocytes but didn't stu...
Childhood cancer survivors are more likely to go through early menopause
...Institute. Risk factors include radiation to the ovaries
and certain forms of chemotherapy. Over 70% of children or adolescents diagnosed with cancer will survive long-term. Survivors have an increased risk of premature menopause, defined as menopause before age 40. Charles A. Sklar, M.D., of Memori...
Study by LIJ obstetrician confirms taller women are more likely to have twins
...rowth hormone. It increases the sensitivity of the ovaries
to follicle stimulating hormone, thereby increasin...t 5 feet 3 inches. While the effect of IGF on the ovaries
likely involves fraternal, or dizygotic, twins, they were not distinguished from identical, or monoz...
Preventive ovary removal linked to early death in younger women
Women younger than 45 years who have both ovaries
removed surgically and do not receive adequate hor... in the reference population who had not had their ovaries
removed. The increased risk was seen mainly in women who were not given oestrogen after surgery unti...
American research finds twins more likely to have premature menopause
...es that we may be able to check. First, discordant ovaries
could arise if early post-implantation embryos spl...the genes needed to make eggs are expressed in the ovaries
of each twin. We are not looking for mutations in the DNA sequence, but gene switches, a topic calle...
Stem cells engage in dialogue with the cells that regulate their futures
...ab used the germline stem cell niche, found in the ovaries
of fruit flies, as a model system. The production of fruit fly eggs depends on the presence of a renewable source of stem cells in the ovary of the adult fruit fly. Inside the fruit fly ovary are structures called germarium which contain tiny cra...
The abortion pill compound prevents breast tumor growth
...Currently, these women often have their breasts or ovaries
surgically removed to reduce the risk of developing cancer. The study appears in the Dec. 1 issue of Science. We found that progesterone plays a role in the development of breast cancer by encouraging the proliferation of mammary cells that carry...
Standard therapy more effective than diabetes drug in helping women with PCOS achieve pregnancy
...le hormones interfere with ovulation and cause the ovaries
to enlarge and fill with cysts. Women with PCOS frequently experience insulin resistance, a pre-diabetic condition in which higher-than-normal amounts of insulin are required to allow glucose to enter tissues. Earlier studies had shown that drug...
Researchers identify ovarian cancer biomarkers
...nts in ovarian tumors were not expressed by normal ovaries
or other healthy organs. The researchers also found these markers were not present in normal reproductive tissues that experience blood vessel growth, such as the placenta or endometrium. This suggests that the markers are specific to tumors and woul...
Ultrasound could help couples undergoing IVF
...uture consider using ultrasound scans of a woman's ovaries
to predict her ovaries' response to IVF. Researc...eggs the patient would ultimately produce when her ovaries
had been stimulated during IVF treatment. A test that can be administered before IVF that indicate...
JCI table of contents -- April 5, 2007
...stages of development. In addition, the testes and ovaries
of EWS-deficient mice were reduced in size compared with these organs in normal mice. In the sperm cell precursors this was, in part, because the X and Y sex chromosomes failed to pair up and because there was no meiotic recombination. This study the...
Study of planarians offers insight into germ cell development
...ells. Blocking nanos in mature adults caused their ovaries
and testes to disappear. And when the researchers blocked nanos expression in planarians that had had their bodies and reproductive organs detached from their brains, the planarians regenerated new bodies, but with no reproductive cells. "This is t...
Studies to find better ways to preserve human eggs, ovarian tissue under way
... making proper connections. The reason for using ovaries
is when you have cancer, if you need chemotherapy,...hey also are retrieving and maturing eggs from cow ovaries
donated by a local slaughterhouse. Bull sperm will be used to test the viability of cow eggs afterwa...
Extracting eggs from pre-pubertal cancer patients brings hope for future fertility
...ll be sterile in later life. In adult women, the ovaries
are stimulated to produce eggs which are removed, ...ent who asked that the oocytes we had found in her ovaries
should be frozen immediately, we matured the 130 others in vitro, said Dr. Revel. 41 were successf...
Personalized approach to ovarian stimulation achieves high ART pregnancy rates
...nces of having to either cancel cycles because the ovaries
have not been stimulated enough or of ovarian hype...stimulation syndrome (OHSS) developing because the ovaries
have been over-stimulated. Moderate or severe OHSS can occur in 3-8% of IVF cycles . Moderate O...
First baby is born after oocytes were matured in the lab and frozen
...ts with polycystic ovarian syndrome (PCOS) or with ovaries
that had been detected to be polycystic by ultraso...e circumstances, oocytes can be collected from the ovaries
without hormonal stimulation, and the immature oocytes can be matured in the laboratory before being...
1 2 3