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The term sperm refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell.
Research Instruments receives European patent for RI Witness system

Research Instruments receives European patent for RI Witness system

Research Instruments Ltd, a company that develops cutting edge technology and biomedical equipment for use in the Assisted Reproduction (AR) sector, today announced the company has been awarded a European patent for their RI Witness system. It's the first to issue from a portfolio of patents filed for RI Witness. [More]
Researchers receive 2.6 million euros to study evolution of sexual reproduction in plants

Researchers receive 2.6 million euros to study evolution of sexual reproduction in plants

A European and US consortium coordinated by Jorg Becker, group leader at the Instituto Gulbenkian de Ciencia (IGC; Portugal), has now received funding of 2.6 million euros for 3 years to study the evolution of sexual reproduction in plants. The project is funded under the scope of ERA-CAPS, a European network dedicated to support research activities in Plant Sciences. [More]
Certain stem cells use microscopic nanotubes to communicate with neighboring cells, shows research

Certain stem cells use microscopic nanotubes to communicate with neighboring cells, shows research

When it comes to communicating with each other, some cells may be more "old school" than was previously thought. Certain types of stem cells use microscopic, threadlike nanotubes to communicate with neighboring cells, like a landline phone connection, rather than sending a broadcast signal, researchers at University of Michigan Life Sciences Institute and University of Texas Southwestern Medical Center have discovered. [More]
New research links mutations in TEX11 gene to some cases of male infertility

New research links mutations in TEX11 gene to some cases of male infertility

In the most severe form of male infertility, men do not make any measurable levels of sperm. This condition, called azoospermia, affects approximately 1 percent of the male population and is responsible for about a sixth of cases of male infertility. [More]
Caya contoured diaphragm to expand U.S. women's options for nonhormonal barrier contraception

Caya contoured diaphragm to expand U.S. women's options for nonhormonal barrier contraception

With the launch of the Caya contoured diaphragm this June, women in the United States will have access to a method of contraception that is nonhormonal, has few side effects, and can be used for up to two years. Last fall, the United States Food and Drug Administration cleared the single-size Caya contoured diaphragm for marketing in the US, and now the diaphragm is available by prescription from healthcare providers. [More]
Groundbreaking UVA research may lead to creation of male contraceptive

Groundbreaking UVA research may lead to creation of male contraceptive

Groundbreaking new reproductive research from the School of Medicine has identified key molecular events that could be playing a critical role as sperm and egg fuse to create new life. The findings might one day lead to the creation of a male contraceptive. [More]
Women who underwent uterine transplantation adjust to sudden restoration of fertility

Women who underwent uterine transplantation adjust to sudden restoration of fertility

In October last year the Gothenburg, Sweden, group of Mats Bra?nnstro?m announced the world's first live birth following the transplantation of a donated uterus. [More]
Study on how maternal proteins help regulate initial cell divisions during early development

Study on how maternal proteins help regulate initial cell divisions during early development

Researchers in the University of Georgia's Regenerative Bioscience Center are visually capturing the first process of chromosome alignment and separation at the beginning of mouse development. The findings could lead to answers to questions concerning the mechanisms leading to birth defects and chromosome instability in cancer cells. [More]
Study finds increased rates of autism among the children of teen moms

Study finds increased rates of autism among the children of teen moms

The largest-ever multinational study of parental age and autism risk, funded by Autism Speaks, found increased autism rates among the children of teen moms and among children whose parents have relatively large gaps between their ages. The study also confirmed that older parents are at higher risk of having children with autism. The analysis included more than 5.7 million children in five countries. [More]
Electroporation technique brings higher efficiency, higher  throughput genome engineering in animal models

Electroporation technique brings higher efficiency, higher throughput genome engineering in animal models

Jackson Laboratory researchers have shown that using an electric current to deliver the CRISPR/Cas9 system, in order to engineer genetic changes in laboratory mice, is highly efficient and significantly improves the system's throughput. [More]
Researchers reveal that 6.5% of de novo genetic mutations occur during embryonic development

Researchers reveal that 6.5% of de novo genetic mutations occur during embryonic development

Until now, de novo genetic mutations, alterations in a gene found for the first time in one family member, were believed to be mainly the result of new mutations in the sperm or eggs (germline) of one of the parents and passed on to their child. [More]
UC Santa Cruz-led study offers new insights into molecular mechanisms of biological clock

UC Santa Cruz-led study offers new insights into molecular mechanisms of biological clock

A new study led by UC Santa Cruz researchers has found that a protein associated with cancer cells is a powerful suppressor of the biological clock that drives the daily ("circadian") rhythms of cells throughout the body. [More]
Norwegian Biotechnology Council recommends that egg donation be made legal in Norway

Norwegian Biotechnology Council recommends that egg donation be made legal in Norway

More than 5 million children in Europe have been born as a result of assisted reproductive technologies, yet many European countries, including Norway, have regulations that restrict different aspects of these technologies. [More]
New imaging technique may improve testicular sperm extraction, reduce trauma during surgery

New imaging technique may improve testicular sperm extraction, reduce trauma during surgery

In the middle of Europe nearly every sixth couple in the reproductive age is involuntarily childless, in 50% due to male infertility. In about 10% of all infertile men azoospermia is diagnosed, i.e. no spermatozoa are found in the ejaculate. [More]
Investigating epigenetic marks in ancient DNA could help understand health of ancient populations

Investigating epigenetic marks in ancient DNA could help understand health of ancient populations

A new study by anthropologists from The University of Texas at Austin shows for the first time that epigenetic marks on DNA can be detected in a large number of ancient human remains, which may lead to further understanding about the effects of famine and disease in the ancient world. [More]
Study analyses advantages of using fractions of ejaculate in IVF

Study analyses advantages of using fractions of ejaculate in IVF

Sperm in the first fraction of ejaculate are more numerous, move more and present better quality DNA than those lagging behind. This is the conclusion of a study led by the Ginemed fertility clinic, which confirms that while the objective of the first fraction is to fertilise the egg, the second phase is so that no sperm from any other male has a chance to fertilise it. [More]
Leeds scientists examine benefits of hyaluronic acid in helping improve IVF success rates

Leeds scientists examine benefits of hyaluronic acid in helping improve IVF success rates

Scientists from the University of Leeds are investigating whether a molecule usually found in moisturisers and skin creams could improve IVF success rates in the UK. [More]
Linkam and Cambridge IVF work on the development of new protocols for sperm testing

Linkam and Cambridge IVF work on the development of new protocols for sperm testing

IVF is becoming increasingly important as fertility and birth rates fall in developed countries. Ensuring patients get the right treatment is important both from an emotional and financial perspective... [More]
Study finds similarity in clinical progression between human patients and Huntington's disease monkeys

Study finds similarity in clinical progression between human patients and Huntington's disease monkeys

Transgenic Huntington's disease monkeys show similarity to humans with Huntington's in their progressive neurodegeneration and decline of motor control, scientists from Yerkes National Primate Research Center, Emory University, report. [More]
Researchers develop new IVF technique to improve fertility treatment

Researchers develop new IVF technique to improve fertility treatment

For couples struggling to conceive the old-fashioned way, in vitro fertilization (IVF) provides an alternate route to starting a family. When eggs are mixed with sperm in test tubes, the fertilized eggs to grow into embryos that can be implanted inside the uterus of a woman who will carry them to term. [More]
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