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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.
'Housekeeping' gene may have a link to male infertility

'Housekeeping' gene may have a link to male infertility

Researchers at Iowa State University have found evidence that a "housekeeping" gene present in every cell of the body may have a link to male infertility. [More]
Study sheds light on mechanisms linked to formation of healthy egg cells in humans

Study sheds light on mechanisms linked to formation of healthy egg cells in humans

Congenital disorders such as Down's syndrome could be better understood, following new insights into how healthy cells are formed. [More]
Using painkillers during pregnancy may harm fertility of daughters

Using painkillers during pregnancy may harm fertility of daughters

Using painkillers in pregnancy may reduce fertility in subsequent generations, research suggests. Tests in rats found that when a mother was given painkillers during pregnancy, her female offspring had fewer eggs, smaller ovaries and smaller litters of babies than those not exposed to the drugs. [More]
Involuntarily childless couples could be helped with extra sperm analysis

Involuntarily childless couples could be helped with extra sperm analysis

New research findings from Lund University in Sweden show that a simple analysis of chromosomal breaks in sperms can facilitate choice of the most efficient treatment and, thereby, increase chances of successful assisted reproduction in involuntary childless couples. [More]
Specific genetic pattern in the womb could predict IVF treatment outcome

Specific genetic pattern in the womb could predict IVF treatment outcome

Fertility experts in Southampton and the Netherlands have identified a specific genetic pattern in the womb that could predict whether or not IVF treatment is likely to be successful. [More]
PGD model could provide policy guideposts for human genome editing

PGD model could provide policy guideposts for human genome editing

Human genome editing for both research and therapy is progressing, raising ethical questions among scientists around the world. [More]
Depression in expectant parents during pregnancy increases risk of premature birth

Depression in expectant parents during pregnancy increases risk of premature birth

Depression in both expectant mothers and fathers increases the risk of premature birth, finds a study published in BJOG: an International Journal of Obstetrics and Gynaecology (BJOG). [More]
Newly discovered mechanism may help explain why some embryos not useful for fertility treatments

Newly discovered mechanism may help explain why some embryos not useful for fertility treatments

It's the dream of many infertile couples: to have a baby. Tens of thousands of children are born by in vitro fertilization, or IVF, a technique commonly used when nature doesn't take its course. However, embryos obtained when a sperm fertilizes an egg in a test tube often have defects. [More]
Children conceived through infertility treatments no more likely to have developmental delays

Children conceived through infertility treatments no more likely to have developmental delays

Children conceived via infertility treatments are no more likely to have a developmental delay than children conceived without such treatments, according to a study by researchers at the National Institutes of Health, the New York State Department of Health and other institutions. [More]
Growing number of North Americans traveling to Europe for low-cost in vitro fertilization treatments

Growing number of North Americans traveling to Europe for low-cost in vitro fertilization treatments

North Americans travel to Europe for many reasons, including business, vacation or trips to learn more about their family heritage. [More]
Harley Street Fertility Clinic encourages couples to have more sex to increase chances of conception

Harley Street Fertility Clinic encourages couples to have more sex to increase chances of conception

Today, one of the UK’s leading fertility experts warns that couples with busy lives are not engaging in enough sexual intercourse and this is therefore impacting the nations fertility. [More]
Endocrine-disrupting chemicals pose threat to male reproductive health

Endocrine-disrupting chemicals pose threat to male reproductive health

The birth rate is declining in all industrialised countries, and socioeconomic factors and women's age are not solely to blame. Male reproductive health and environmental factors are also significant, as concluded in a new scientific review article. [More]
Environmental and lifestyle factors damage men's reproductive health

Environmental and lifestyle factors damage men's reproductive health

Environmental and lifestyle factors are damaging men's reproductive health and may be playing a large role in decreasing fertility rates in industrialized countries, a new study in Physiological Reviews reports. Socioeconomic influences and female reproductive health cannot solely be blamed for higher incidences of infertility, the study supports. [More]
New device can help diagnose stroke in less than 10 minutes

New device can help diagnose stroke in less than 10 minutes

Minutes count when treating stroke, but current diagnostics take as long as three hours, careful lab work and skilled technicians to arrive at a conclusive diagnosis. Scientists at Cornell University's Baker Institute for Animal Health have developed a device that helps diagnose stroke in less than 10 minutes using a drop of blood barely big enough to moisten your fingertip. [More]
Opsin proteins contribute to heat-seeking movement of sperm

Opsin proteins contribute to heat-seeking movement of sperm

In their arduous journey to the egg, sperm "feel" the heat of the fallopian tube and "taste" the chemical signals of the ova. But a new Weizmann Institute of Science study published in Scientific Reports, in Nature, shows that sperm actually make quite a bit of use of sensors that have mainly been known to belong to the visual system. [More]
Research brings scientists closer to understanding mechanisms underlying genomic imprinting process

Research brings scientists closer to understanding mechanisms underlying genomic imprinting process

Research led by Dr. Keiji Tanimoto from the University of Tsukuba, Japan, has brought us closer to understanding the mechanisms underlying the phenomenon of genomic imprinting. [More]
New progenitor cells differentiate into mature cell types, prevent risk of unwanted tumors

New progenitor cells differentiate into mature cell types, prevent risk of unwanted tumors

Human pluripotent stem cells (hPSC) can become any type of cell in the adult body, offering great potential in disease modeling, drug discovery and creating replacement cells for conditions ranging from cardiovascular to Alzheimer's disease. [More]
INVO Bioscience obtains de novo clearance from FDA for INVOcell fertility treatment

INVO Bioscience obtains de novo clearance from FDA for INVOcell fertility treatment

INVO Bioscience, Inc., a medical device company focused on treatment option for patients diagnosed with infertility, today announced that the U.S. Food and Drug Administration has granted the Company's de novo request for the INVOcell. [More]
New paper device could rapidly and inexpensively assess hepatitis B, male infertility

New paper device could rapidly and inexpensively assess hepatitis B, male infertility

Scientists have developed a new paper device that analyzes DNA and could rapidly and inexpensively assess disparate conditions including hepatitis B and male infertility, which together affect millions of people around the world. The test, reported in the Journal of the American Chemical Society, could be of particular help diagnosing people in low-income areas. [More]
Study shows restoring testosterone production in men does not impact their fertility

Study shows restoring testosterone production in men does not impact their fertility

Restoring testosterone production in men may be as effective as replacing it, without compromising their fertility. Two phase III clinical trials show that a drug that restores the body’s natural production of testosterone has no negative effect on a man’s sperm count while a topical testosterone gel causes a significant drop. [More]
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