Researchers from Huntsman Cancer Institute (HCI) at the University of Utah have discovered that while the genes provided by the father arrive at fertilization pre-programmed to the state needed by the embryo, the genes provided by the mother are in a different state and must be reprogrammed to...
Scientists at the Babraham Institute have gained a new understanding of when and how the DNA in developing egg and sperm cells is 'reset', in preparation for making a new embryo. It is well known that small chemical groups can be added to DNA to alter gene activity, these modifications to the...
A new study led by scientists from the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) found that a healthy intake of micronutrients is strongly associated with improved sperm DNA quality in older men. In younger men, however, a higher intake of micronutrients...
Healthy young men with a Western-style diet may be able to boost their sperm quality by eating a small packet of walnuts a day. These are the findings of a new study that shows healthy American men in their 20s and 30s who ate a 75g (2.5 ozs) packet of walnuts a day were able to increase the...
The entire genomes of 91 human sperm from one man have been sequenced by Stanford University researchers. The results provide a fascinating glimpse into naturally occurring genetic variation in one individual, and are the first to report the whole-genome sequence of a human gamete - the only...
If you aren't willing or able to get knocked up the old-fashioned way, getting pregnant can be seriously expensive. As someone who struggles with infertility, I am acutely aware of that fact. Here in the US, the average adoption costs between $25,000 and $35,000. A single round of in vitro...
For a long time, fertility doctors have told men that, for optimal sperm viability and healthy, they should consider making lifestyle changes, like quitting smoking, reducing their consumption of alcohol, and losing weight. But new research out of the UK indicates that those kinds of changes may...
The discovery of a gene that enables sperm to mature may lead to the development of a non-hormonal male contraceptive, according to new research in mice, led by the University of Edinburgh, Scotland, that was published in the journal PLoS Genetics on 24 May. Currently, the only male...
A study in The Journal of Cell Biology describes how a secreted enzyme helps egg cells avoid being fertilized by more than one sperm. Because polyspermy disrupts embryonic development, oocytes take several steps to ensure they only fuse with a single sperm. One key step is to prevent additional...
Yale researchers have discovered how the "guardian of the genome'' oversees quality control in the production of sperm - and perhaps in many other cells as well. The research published online in the journal Current Biology opens up the potential of developing new forms of birth control and...
Every time I have sex and ejaculate it sprays all over the place. It hits the bed post, the wall, and it always its my girlfriend in the face. Any tips.
Do girls find this gross or is it a turn on?
i'm 13 and i have been learning sexed at my school and i have a question but i'm kinda nervous to ask my teacher. when everyone was sperm (before we were born) were we alive?
Did you know that the female human egg actually "captures" sperm in order to begin the fertilization process? In what is called a "sticky" egg, a sugary SLeX molecular outer coating enables the two entities to bind together. Researchers have uncovered exactly how a human egg captures an...
Male squid (Loligo bleekeri) employ different reproductive strategies depending on their body size. Research published in BioMed Central's open access journal BMC Evolutionary Biology shows that the divergent mating behavior of male squid has resulted in the evolution of different sperm sizes...
A common gene mutation that causes sperm to lose its protective protein coat so it falls prey to the female immune system on its journey to the egg, may be the main reason for infertility in men worldwide, writes an international team of researchers in a paper published in the journal Science...
Okay, so yesterday I found my Western Fence Lizard basking as usual, but I found 2 symmetrical globs of...lizard seed, near his vent. I am trying to get him to breed with my female, so I am wondering if it's normal to have a little bit left over. It was a tiny bit, but what I want to know is did...
Okay, so yesterday I found my Western Fence Lizard basking as usual, but I found 2 symmetrical globs of...lizard seed, near his vent. I am trying to get him to breed with my female, so I am wondering if it's normal to have a little bit left over. It was a tiny bit, but what I want to know is did...
I got my semen report done sometime ago and it was very distressing. The doc said there is a varicocele and I some time after treatment was underway I repeated it ( just a few days ago). Initially it was just 1.2 million per ejaculate with dead sperms in there . Now it has shot up to 22...
I got my semen report done sometime ago and it was very distressing. The doc said there is a varicocele and I some time after treatment was underway I repeated it ( just a few days ago). Initially it was just 1.2 million per ejaculate with dead sperms in there . Now it has shot up to 22...