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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.
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]
ISSCR calls for moratorium on human germline genome editing attempts in clinical practice

ISSCR calls for moratorium on human germline genome editing attempts in clinical practice

In response to an article published by Chinese scientists describing research that used gene editing technologies in human embryos, the International Society for Stem Cell Research has again called for a moratorium on attempts at human clinical germline genome editing while extensive scientific analysis of the potential risks is conducted, along with broad public discussion of the societal and ethical implications. [More]
Johns Hopkins researchers link sperm with specific 'epigenetic tags' to autism

Johns Hopkins researchers link sperm with specific 'epigenetic tags' to autism

In a small study, Johns Hopkins researchers found that DNA from the sperm of men whose children had early signs of autism shows distinct patterns of regulatory tags that could contribute to the condition. A detailed report of their findings will be published online in the International Journal of Epidemiology on April 15. [More]
High levels of pesticide residues in fruits, vegetables can affect semen quality

High levels of pesticide residues in fruits, vegetables can affect semen quality

Men who ate fruits and vegetables with higher levels of pesticide residues—such as strawberries, spinach, and peppers—had lower sperm count and a lower percentage of normal sperm than those who ate produce with lower residue levels, according to a new study by researchers at Harvard T.H. Chan School of Public Health. [More]
EHT expert paper raises important and unanswered questions about safety of wearable tech

EHT expert paper raises important and unanswered questions about safety of wearable tech

Wearable technology is raising health concerns worldwide. A recent New York Times article by Nick Bilton is raising important and unanswered questions about the safety of wearable tech, according to the non-profit research group, Environmental Health Trust. [More]
ISSCR statement calls for moratorium nuclear genome editing of human germ line

ISSCR statement calls for moratorium nuclear genome editing of human germ line

In a statement released yesterday, the International Society for Stem Cell Research called for a moratorium on attempts at clinical application of nuclear genome editing of the human germ line to enable more extensive scientific analysis of the potential risks of genome editing and broader public discussion of the societal and ethical implications. [More]
Letrozole helps restore fertility in obese, infertile men

Letrozole helps restore fertility in obese, infertile men

A letrozole pill once a week restored fertility in obese, infertile men and led to their partners giving birth to two full-term, healthy babies, according to a new study from Canada. The results will be presented Thursday at the Endocrine Society's 97th annual meeting in San Diego. [More]
Phthalate exposure in pregnancy adversely affects masculinization of male genitals in babies

Phthalate exposure in pregnancy adversely affects masculinization of male genitals in babies

Exposure to hormone-altering chemicals called phthalates - which are found in many plastics, foods and personal care products - early in pregnancy is associated with a disruption in an essential pregnancy hormone and adversely affects the masculinization of male genitals in the baby, according to research led by the University of Pittsburgh Graduate School of Public Health. [More]
Researchers one step closer to unraveling complex processes crucial to sperm development

Researchers one step closer to unraveling complex processes crucial to sperm development

Researchers are one step closer to unraveling the extraordinarily complex series of processes that leads to an event crucial to human reproduction: the creation of sperm. [More]
CHOPS syndrome sheds light on key biological processes during human development

CHOPS syndrome sheds light on key biological processes during human development

Analyzing a puzzling multisystem disorder in three children, genetic experts have identified a new syndrome, shedding light on key biological processes during human development. The research also provides important information to help caregivers manage the disorder, and may offer clues to eventually treating it. [More]
Einstein researchers find possible clue to why older mothers have babies born with Down syndrome

Einstein researchers find possible clue to why older mothers have babies born with Down syndrome

Researchers at Albert Einstein College of Medicine of Yeshiva University have found a possible clue to why older mothers face a higher risk for having babies born with conditions such as Down syndrome that are characterized by abnormal chromosome numbers. [More]
First comprehensive maps and analyses of human epigenomes revealed

First comprehensive maps and analyses of human epigenomes revealed

Two dozen scientific papers published online simultaneously on Feb. 18, 2015 present the first comprehensive maps and analyses of the epigenomes of a wide array of human cell and tissue types. Epigenomes are patterns of chemical annotations to the genome that determine whether, how, and when genes are activated. [More]
UT Southwestern scientists identify new biomarker that could optimize chemotherapy response

UT Southwestern scientists identify new biomarker that could optimize chemotherapy response

UT Southwestern Medical Center scientists have identified a new biomarker that could help identify patients who are more likely to respond to certain chemotherapies. [More]
Microsurgical technique revolutionizes treatment of infertile men

Microsurgical technique revolutionizes treatment of infertile men

A microsurgical technique credited with revolutionizing treatment of men once thought to be infertile was recently performed at Henry Ford Hospital in Detroit, a first for southeast Michigan. [More]
Study shows that de novo mutations can be detected in human in vitro fertilized embryos using PGD

Study shows that de novo mutations can be detected in human in vitro fertilized embryos using PGD

Reprogenetics, the largest U.S. genetics laboratory specializing in Preimplantation Genetic Diagnosis (PGD), announced today the publication of new clinical data in the March issue of Genome Research demonstrating that de novo single base mutations can be detected in embryos after in vitro fertilization (IVF). [More]
Jefferson, RMA of Philadelphia announce clinical partnership

Jefferson, RMA of Philadelphia announce clinical partnership

Jefferson announced today its clinical partnership with RMA of Philadelphia, merging the expertise of two outstanding groups of reproductive specialists on its Center City campus. [More]
Parents can pass silenced genes to offspring through a specific mechanism

Parents can pass silenced genes to offspring through a specific mechanism

For more than a century, scientists have understood the basics of inheritance: if good genes help parents survive and reproduce, the parents pass those genes along to their offspring. And yet, recent research has shown that reality is much more complex: genes can be switched off, or silenced, in response to the environment or other factors, and sometimes these changes can be passed from one generation to the next. [More]
INRS researchers to use new specialized equipment to study environmental equity, male infertility

INRS researchers to use new specialized equipment to study environmental equity, male infertility

With the acquisition of new specialized equipment, INRS researchers Philippe Apparicio, Géraldine Delbès, and Maritza Jaramillo and their teams will be able to advance knowledge and train highly qualified people in the fields of environmental equity, reproductive toxicology, and the treatment of infections. They received a total of over $1 million from the Quebec government and the John R. Evans Leaders Fund of the Canadian Foundation for Innovation. [More]
Study: ICSI technique no better than conventional IVF

Study: ICSI technique no better than conventional IVF

The use of an assisted reproduction technique known as intracytoplasmic sperm injection (ICSI) doubled between 1996 and 2012, although compared with conventional in vitro fertilization (IVF), use of ICSI was not associated with improved reproductive outcomes, according to a study in the January 20 issue of JAMA. [More]
Scientists image zinc atoms released by fertilized mammalian egg

Scientists image zinc atoms released by fertilized mammalian egg

Sparks literally fly when a sperm and an egg hit it off. The fertilized mammalian egg releases from its surface billions of zinc atoms in "zinc sparks," one wave after another, found a Northwestern University-led interdisciplinary research team that includes experts from the U.S. Department of Energy's Advanced Photon Source at Argonne National Laboratory. [More]
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