Scientists unpick genetics of first 15 minutes of life
...erones' the early processes that take place once a sperm enters an egg, giving it a crucial role in the mos...he DNA from the mother's egg cell and the father's sperm cell meet for the first time," said Dr Tim Karr from the University of Bath (UK) who worked closely ...Targeted drug delivery achieved with nanoparticle-aptamer bioconjugates
.... The prostate produces the seminal fluid in which sperm is transported. Prostate cancer begins with small changes in size and shape of the prostate gland cells which can develop into an uncontrolled growth of cells. Prostate cancer predominantly affects Western populations although the black population h...New treatment options for patients with prostate cancer
.... The prostate produces the seminal fluid in which sperm is transported. Prostate cancer begins with small changes in size and shape of the prostate gland cells which can develop into an uncontrolled growth of cells. Prostate cancer predominantly affects Western populations although the black population h...... especially students coming forward as potential sperm donors fell sharply after 2000, almost certainly d...owed that the number of men interested in donating sperm had declined significantly, with a consequent reduction in the number recruited. This fall could con...Sperm stem cells closer to being like embryonic stem cells
... Nov. 15, 2005 New experiments that prevented rat sperm stem cells from changing permanently into sperm have brought researchers one step closer to coaxing such cells to behave like embryonic stem cells, ......ne (inherited material that comes from the eggs or sperm and is passed on to offspring) EGFR variants and overall survival with gefitinib. Investigators identified an association of common germline EGFR promoter single-nucleotide polymorphisms (SNPs, common, but minute, variations that occur in human DNA...Study hints at role of stem cell genes in testicular, breast cancers
...cells, which are located in the testis and produce sperm in boys following puberty. Germ cells, like all cells of the body, develop from embryonic stem cells, and go through a multi-stage evolution in their structure and genetic activity before attaining their mature state. The study revealed that the gene...Slight increased risk of major birth defects associated with IVF
...mination or IUI (a less complex procedure in which sperm is injected into the uterus to fertilize an egg) and 369 of 8,422 naturally conceived children. The comparative birth defect rates were: 6.2 percent for IVF babies, 5 percent for IUI babies and 4.4 percent for naturally conceived babies. Van Voorhis...The secret love life of plants
...ms a pollen tube. It then uses each one of its two sperm cells to fertilise the egg cell, from which the em..., the cdc2-plants develop pollen that has only one sperm cell instead of two. The researchers have now been exploring the question if whether, under these co...Learning about sex from an elegant worm
... (not just once, as nonsex cells do), resulting in sperm or eggs with just one set of chromosomes each. No...tis elegans, to ensure that the chromosomes of its sperm and eggs have been matched and recombined accurately during meiosis. Their discoveries hold promise ...Fertility genes discovered at Rugters
...e cells it infects just as fertilization transmits sperm DNA to the egg, Singson explained. Fertilization h...odites. When hermaphrodites are young they produce sperm and switch to produce eggs as adults. The Rutgers researchers were thus able to alter eggs in the he...Research tracks whales by listening to sounds
...hose hydrophones, Mellinger discovered a number of sperm whales living in the Gulf of Alaska in the winter...."There are a handful of records of people spotting sperm whales in the region and they're all in the summer," Mellinger said. "Likewise, all of the historic...Underwater listening devices yield discoveries about endangered large whales
..., fin, humpback, North Pacific right, bowhead, and sperm whales, an article in the January 2006 issue of BioScience reports. Because whale calls can be detected and recognized over tens of miles, such devices (which emit no sound) have added to scientific knowledge of the movements and calling behavior o...US woman gives birth to baby from world's first frozen donor egg bank
...e technology to successfully freeze and thaw donor sperm for infertile couples has been available for decades. However, the technology to successfully freeze women's eggs did not exist until recently, prompting Cryo Eggs International (CEI) to open its doors and offer donor eggs to infertile patients who w...Component in soy products causes reproductive problems in laboratory mice
...single oocyte that is ovulated and fertilized by a sperm to get a healthy baby. Genistein seems to have a way of making this task very difficult," said Newbold. "I don't think we can dismiss the possibility that these phytoestrogens are having an effect on the human population," said Dr. Jefferson. "The...Clawed frog helps Fanconi anemia research make leaps
...n, by chemically activating the extract and adding sperm DNA from the male frog, the proteins in the extract unwind the DNA and the replication process is off and running under the watchful eyes of the researchers. "That's just the beginning of what we want to do with these extracts to study how the Fanco...Capturing the electrical activity of sperm
...time, captured the electrical activity of a single sperm cell. The technically difficult maneuver, reported...he sperm's outer membrane. The ability to measure sperm currents has also enabled the researchers to pin down the role of a protein called CatSper that is v......nfertility and design new contraceptives to thwart sperm entry into the egg. What's more, they said, the ex...op on the electrical currents inside the squirming sperm cell could literally open a new window into its largely mysterious inner workings. Howard Hughes Me...A new way of looking at molecular motors
... birth or by preventing parts of the body, such as sperm tails or the tiny hairs that keep mucus flowing in the lungs, from moving when they are supposed to. The motors in parasitic organisms contribute to disease by enabling the parasites to break through biological barriers within the human body and acti...Americans prefer to leave child's sex to chance, survey finds
...." Sperm separation requires patients to provide a sperm sample and undergo an average of three to five cycles of intrauterine insemination at a fertility center, at a cost of approximately $2,500 per attempt. The survey found that while the majority of respondents would not choose the sex of their child u...