Wanaume wengi hawajui umri sahihi wa kupata watoto au kuwatotolesha waandani wao...............leo nimesoma katika gazeti la Ijumaa Wikienda ambapo msanii mmoja wa kizazi kipya (jina nimelihifadhi)......alishiriki hata kwenye Tusker Project Fame............akidai mipango yake ya kuoa ni akifikisha umri wa miaka 45......ikiashiria ya kuwa huenda ndani yake ipo mipango yake kamambe ya kuanzisha familia..... well atakuwa amechelewa..........kwa sababu umri sahihi wa kupata watoto kwa mwanaume ni miaka 25 hadi 35 kwa sababu mbegu za kiume huanza kupoteza nguvu baada ya miaka 35 na huendelea kudhoofu mbegu tajwa baada ya umri huo.................................kabla ya miaka 25 mbegu hizo zinakuwa hazijakomaa na hivyo kutokuwa na uwezo wa kuhakikisha uzazi wenye siha ya kutosha.......................... Madhara ya kuzaa watoto watokanao na mbegu dhaifu ni pamoja na kupata watoto wenye vilema vya viungo, akili zisizo timamu (particulary autism)..........ugonjwa ambao ni vigumu kuutambua..........................utakuta watu wakilalama mtoto huyo ***** sijui kwanini................angalia umri wa wazazi wake walipomzaa..............mara nyingi ila siyo mara zote tatizo ni umri wa wazazi......ingawaje na llishe ya mama mjamzito pia ina mchango mkubwa kwenye hili eneo kwenye nchi zetu ambazo zaidi ya theluthi mbili ya raia wetu huishi kwa mlo mmoja usio na virutubisho tosheleza kulingana na mahitaji ya mwili....................................... SOURCE: WIKIPEDIA.................... How your age can affect your fertility and your baby's health Dads are getting older Age and your fertility Age and your child's health Down's syndrome and other conditions What can you do? Dads are getting older More and more of us are leaving it later in life to start a family, and the sight of silver-haired dads proudly wearing a baby sling is becoming increasingly familiar. While childbearing for women ends at the menopause, men can go on fathering children into their 50s, 60s and 70s; just take a look at Michael Douglas, Paul McCartney and Des O'Connor. But while the rising age of first-time mothers is a hot topic of debate in the national press, the impact of men's age on their fertility and the health of their children has largely been ignored. Age and your fertility For years it was assumed that men's fertility remains the same from puberty until they die. However, it seems that, like women, men have a biological clock ticking away their reproductive years. Although men in their 70s or even 80s can, and do, father children, a man this age is more likely to take years rather than months to get his partner pregnant. As men age, their testes become smaller and softer and the volume, morphology (shape) and motility (ability to move) of their sperm declines. This makes it more difficult for the sperm to fertilise an egg. A study published in 2000 found that, in couples who successfully go on to have a baby, the probability that the couple will take longer than a year to conceive is about eight per cent when the man is under 25, but almost doubles to 15 per cent when the man is over 35. What's more, a woman whose partner is at least five years older than her has less chance of conceiving within a year than a woman whose partner is the same age as her, irrespective of her age. It's thought that the odds on conceiving within a year of trying decrease by three per cent for every year that the man is over the age of 24. These changes aren't as sudden or noticeable as the female menopause, but happen gradually over time. The quality of one man's sperm can deteriorate more slowly over time than another's. Older men can also develop medical conditions, such as diabetes, that interfere with their libido or ability to get an erection. Don't throw in the towel just yet, though, as not all men will have these problems, particularly if they maintain their health and fitness. Age and your child's health The effects of age on sperm are not just limited to a decline in volume, shape and motility. There's also growing evidence that the offspring of older fathers run an increased risk of genetic abnormalities and other long-term health problems. This is because older men tend to have more sperm with DNA mutations. Both younger and older men develop damaged or unhealthy sperm, but usually a process called apoptosis eliminates any defective sperm. A study published in 2003 found that apoptosis did not occur as efficiently in the older men and that there was a higher percentage of damaged sperm in the semen of men aged 36-57 years than in those of men aged 20-35 years. Down's syndrome and other conditions The increased chance of an older woman having a baby with Down's syndrome has been well documented. However, a large study carried out in New York discovered that, among mothers aged 40 or more, 50 per cent of the risk of Down's syndrome was attributable to the advanced age of the father. Even larger studies have since confirmed a slightly increasing risk of congenital abnormalities, such as Down's, as the father's age increases. However, the authors of the largest study, of 77,514 baby's with birth defects in Canada concluded that overall the association between birth defects and paternal age is weak. Other conditions that have been related to paternal age include achondroplasia, a type of dwarfism, and Marfan syndrome, which is a condition with cardio vascular problems and abnormal length of the extremities, especially the fingers and toes. Bear in mind, though, that these conditions are extremely rare and, even for an older father, the risk of having an affected child is extremely low. Links have also been found between paternal age and longer term health problems such as, childhood leukaemia and schizophrenia. While childhood leukaemia is also strongly linked to maternal age and environmental factors, schizophrenia seems to appear in children with older fathers where there is no previous family history. As research in this area grows, it should become clear whether these associations are down to mutations in the DNA of older father's sperm or whether there are other factors at play. What can you do? So that's the bad news; now for the good. There is plenty you can do to look after yourself and keep your fertility and potency in tip-top condition. For a start, you can put yourself on that diet you've been meaning to start. A man's waist size is directly proportional to his testosterone level. All fat cells break down testosterone, but belly fat destroys testosterone fastest of all. So the higher a man's waist measurement, the lower his testosterone level. Just to prove that it's not just your age that matters, a recent study concluded that an extra 4-5 points on your BMI (body mass index) can reduce your testosterone levels to that of a man ten years older than you. A waist size of 40 inches (102 centimetres) or more is also a risk factor for heart disease in men. Heart disease slows blood flow throughout the body, and that includes your penis. You may also want to go over other aspects of your lifestyle that could impact on your fertility. And consider having an MOT with your GP or a "well man" check with your nurse. Common causes of male infertility include clogged ejaculatory ducts and enlarged veins in the scrotum, called varicoceles. All of these conditions are treatable. (Read more about the causes of infertility.) Finally, you can comfort yourself with the fact that, while male fertility may gradually decline with the years, the majority of chaps will still be fertile and functioning at 60 and beyond. Compared with the fertility freefall that women experience after the age of 35, that's quite something.