Maybe you thought you didn’t want to have children in the future, but now your plans have changed. Though a vasectomy is a permanent form of birth control, it may be reversed. Find out if you’re a candidate for vasectomy reversal here.
Every day more information and knowledge is discovered with respect to the basic science of fertility. The foundation of the study of fertility begins with how a sperm fertilizes an egg. Sperm undergo a variety of changes as they make their way from the ejaculate to the egg including hyperactivation, acrosome reaction and nuclear decondensation. Oocytes or eggs also undergo many changes almost immediately after fertilization. But the basics of the knowledge of fertilization itself remains, in large part, a work in progress. Recently, more progress in our understanding of fertilization has been made.
Dr. Enrica Bianchi from the Welcome Trust Sanger Institute recently published in the Journal Nature regarding the discovery of a pairing of sperm-egg proteins which are essential to the process of fertilization. The Izumo-Juno pairing is the first known essential interaction for sperm-egg recognition in any mammal and is conserved among many mammals including mice as well as people.
The Izumo protein on the sperm that recognizes the egg was identified in 2005 by Japanese researchers.
Dr. Bianchi’s group developed an artificial version of the Izumo protein in order to identify its counterpart on the surface of the egg.
The current discovery is the identification of folate receptor 4 on the egg which the authors propose to rename Juno (named after the Roman Goddess of fertility and marriage).
The Juno-egg protein becomes undetectable just 40 minutes after the initial pairing. There is speculation that this may be a safeguard in the prevention of polyspermy, or the fertilization of one egg by more than one sperm.
The team also developed mice that lacked the Juno protein and found that these mice were infertile and that their eggs did not fuse with normal sperm. Izumo deficient males are similarly infertile.
Looking to the future, discoveries such as this may enable the development of new diagnostic tests for couples having difficulty to conceive. Conversely, more intimate knowledge of sperm egg interaction may also enable the development of new methods of contraception in the future.
Enrica Bianchi, Brendan Doe, David Goulding, Gavin J. Wright. Juno is the egg Izumo receptor and is essential for mammalian fertilization. Nature, 2014; DOI: 10.1038/nature13203
You Might Also Enjoy...
Millions of men are living with erectile dysfunction (ED), a common but embarrassing medical condition. Sexual arousal and erections are complicated, and the causes of ED vary. Find out more about the causes of ED here.
Kidney stones are hard mineral deposits that develop in your kidneys. Stones travel from the kidneys through the urinary tract, often causing intense pain along the way. We treat kidney stones of all sizes to minimize your pain.
Many couples experience infertility when trying for a baby. It’s common to assume that female infertility is the cause, but male infertility is just as common. Find out more about some of the most common myths surrounding male infertility here.
About 15% of men have varicoceles, which are enlarged veins in the scrotum. Varicoceles can cause pain and fertility problems, but varicocelectomy is a safe and effective treatment option.
Are you having bladder issues? Suffering from erectile dysfunction? These issues can be hard to talk about, but they could indicate an underlying condition. If you’re having any of these problems, a specialist can help.