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06.02.2014, admin  
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Just who should take responsibility for birth control is a subject that divides many couples. Vasectomies are designed to be a permanent form of contraception (though a reversal is possible) and involve otherwise healthy men going under the knife.Female contraceptives, on the other hand, such as the Pill or implants are effective and reversible, though they can cause nasty side-effects such as weight gain, depression and blood clots.So why are there not more options for men? The simple answer is biology, says Professor Peter Schlegel, head of urology at New Yorka€™s Cornell University and a top authority on male contraception.a€?It is a lot easier to control one egg than the 100 million sperm a man produces every day.
A contraceptive injection given to men once a month could be as effective as the female Pill or condoms. There are only two forms of male contraception - condoms and vasectomies, and they have disadvantagesULTRASOUND ON TESTICLESA 15-minute painless blast of ultrasound to the testes could provide six months of contraception, scientists have found. The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.
A male contraceptive jab could be as effective at preventing pregnancies as the female pill or condoms, work shows.
The monthly testosterone injection works by temporarily blocking sperm production and could revolutionise birth control, experts believe. In trials in China only one man in 100 fathered a child while on the injections, the Journal of Clinical Endocrinology & Metabolism reports.


Family planning campaigners welcomed the news and said they hoped an injection would give couples more choice and enable men to take a greater share of the responsibility for contraception. Previous attempts to develop an effective and convenient male contraceptive have encountered problems over reliability and side effects, such as mood swings and a lowered sex drive. Despite the injection having no serious side effects, almost a third of the 1,045 men in the two-and-a-half year trial did not complete it and no reason was given for this.
He said if further tests proved successful the treatment could become widely available in five years from now. He said in trials, the female Pill was still more effective as a contraceptive than the new jab, but that in real life they might be comparable because it is easier to forget to take a pill. There are only two forms of male contraception a€” condoms and vasectomies, and they have disadvantages.Though condoms have a 98 per cent success rate with perfect use, in reality and with human error, they prevent pregnancy only in 85 per cent of cases a€” an unacceptable risk for many couples.
The testosterone jab is administered in the buttocks and works by regulating two brain chemicals a€” follicle-stimulating hormone and luteinising hormone a€” which has the effect of blocking sperm production temporarily.Testosterone is vital for sperm production, but if the body detects too much it shuts down its sperm production. Studies by researchers at Kinga€™s College Hospital, London, suggest the pill works within three hours and lasts for two days a€” so it is taken when required.
This kills reproductive cells that produce sperm throughout the testes, reducing the sperm count to zero.


It is practically much more difficult.a€™However, with 50,000 men having a vasectomy every year in Britain, there is clearly a market for male family planning and scientists around the world, determined to push back scientific frontiers, are trying to find new options.
A two-year trial in China involving 1,000 men found the injections were 95 per cent effective at preventing pregnancy.
It takes between two and four weeks for sperm production to stop, but men would start producing sperm again almost as soon as they stop taking it.Though vitamin A is also crucial for vision, researchers at Columbia University in New York, who are developing the pill, say it will not affect sight.
Tests on mice have shown the pill is effective, with no side-effects.a€?An additional benefit of our compound is that it can be taken orally, possibly once a day, avoiding the injection process,a€™ says researcher Dr Wendy Chung.
While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. The discovery could lead to a jab of genes that would leave a man permanently sterile, or a drug that blocks the gene from working to be used as a temporary contraceptive. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.




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