The number of abnormal sperm in the semen of elderly men increases, which makes it more difficult to conceive. It was found that in the samples of couples who used in vitro fertilization, the probability of couples not getting pregnant increased by 1 1% with each year of male age.
In addition, abnormal sperm will increase the risk of pregnancy, leading to adverse pregnancy, abortion, deformity and other problems.
Studies have shown that the fertility of men over 40 years old has dropped significantly. From the age of 40, men's testicular function will gradually decline, sperm volume, sperm vitality, sperm concentration, sperm function and so on. Will also be significantly reduced, and their fertility will also be reduced.
However, there are great individual differences in male sperm quality. Some people can still have children in their seventies and eighties, while others may be poor in their fifties.
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20 12 Indian Ramajit Raghav became the oldest newborn father in the world at the age of 96, breaking the record set by himself two years ago. But if he wants to break the record again, will the Biology Society allow it?
The production of male sperm usually lasts a lifetime. Although the research on the influence of age on male fertility is far less than that of women, the research shows that the quantity and quality of semen usually decrease with the increase of male age. A study published in 2004 found that in the samples of couples who used in vitro fertilization, the probability of a couple not getting pregnant would increase by 1 1% for every one-year increase in male age.
More and more studies also show that, just like women, with the increase of age, the chances of men having genetically abnormal children will increase. A recent study published in Nature shows that over time, random mutations in male sperm will accumulate, and more genetic mutations will be passed on to children, which may increase the chances of future generations suffering from autism, schizophrenia and other diseases. Scientists sequenced the entire genomes of 78 Icelandic couples and their offspring, and found that the age of the father at the time of pregnancy was the main factor determining the number of new mutations in the child. The 36-year-old father brought twice as many new genetic mutations to his children as the 20-year-old father, while the 50-year-old father was four times as many as the 20-year-old father. Nevertheless, the absolute risk of an elderly father giving birth to a child with a life-threatening genetic mutation is relatively small.
However, every man's situation is different, and it seems that the deterioration of sperm quality with age can be overcome. According to reports, 96-year-old Ramajit Raghav's diet is rich in vegetables and almonds. He doesn't drink, does yoga every day, and eats more fruits and dairy products, which may have a positive impact on his sperm.
A recent study shows that a diet rich in vitamin C, antioxidants, vitamin E, zinc and folic acid can prevent DNA damage from accumulating in sperm. Scientists evaluated 80 healthy male volunteers between the ages of 22 and 80. The results showed that among men over 44 years old, the probability of sperm DNA damage was 20% lower in men with the highest vitamin C content in their diet than in other men with the lowest vitamin C intake. Antioxidants, vitamin E, zinc and folic acid also have the same effect. If men aged 44 and above consume at least the recommended amount of micronutrients every day, their sperm DNA damage is equivalent to that of young men.
Men's reproductive years are not unlimited! ! !
Remember, everyone, if you can, have a baby as soon as possible, and don't put it off any longer.
Nowadays young people are under increasing pressure, and more and more people don't want to get married and have children so early.
They want to earn more money when they are young, but high housing prices are the best contraceptive, which leads to an increasing childbearing age.
For women, there are still some concerns, because they know that with the growth of age, the quality and quantity of eggs in the ovary will decline, and the fertility will also decline. As long as you are over 35, it is difficult to get pregnant again. Even if you can get pregnant, the risk of accidents during childbirth will increase a lot.
But for men, they don't seem to have this consciousness. It seems to be an accepted fact that july rhapsody is fertile in his fifties and sixties.
There seems nothing wrong with this sentence, but we need to know more.
Pregnancy time becomes longer.
Men and women also have birth clocks, and the male reproductive system will deteriorate with age.
After the age of 35, the quality and quantity of male sperm will decline. That is, the older a man is, the harder it is to get his partner pregnant.
If a man is over 45, it takes him five times as long to get his partner pregnant as a man under 25.
In addition, elderly men are more likely to suffer from medical diseases that adversely affect reproductive function, which may lead to infertility.
Easy abortion
With the increase of men's age, the risk of abortion of their partners is also increasing. The age of the male will affect the chances of the fetus living in the womb.
A woman's risk of abortion with a male partner over 45 is twice as high as that with a male partner under 25.
Because of genetic defects in sperm, the number of chromosomes in fertilized eggs is abnormal, which may not lead to pregnancy, and even if it can be conceived, it is likely to be aborted.
Increased risk of genetic defects
Older men are not only at risk of infertility, they are also more likely to pass on genetic diseases to their children.
The probability of genetic defects in male sperm will increase with age.
We know that a normal sperm should have 23 chromosomes, and a fertilized egg will have 46 chromosomes.
As men get older, more and more sperm will have more or less chromosomes. This means that if fertilization occurs, the chromosome number of fertilized eggs will be abnormal.
Down syndrome, which we are familiar with, occurs because the fertilized egg has an extra chromosome 2 1, that is, the sperm provided by men has genetic defects.
In addition to Down syndrome, children with older fathers are also more likely to have the following defects:
A study conducted by Sorocca University observed the semen quality of normal men aged 25 to 55, and compared the quantity and quality of semen with the age of men.
This study looks at all aspects of semen analysis, including their gender frequency. This is important because abstinence will reduce the quality of semen. Frequent sex can produce healthier sperm.
The researchers found that the amount of semen peaked between the ages of 25 and 30, and the total amount of semen after 55 was very, very small.
This study also found that sperm motility decreases with age, and sperm motility refers to the ability of sperm to swim to eggs. Sperm motility is the best before the age of 25, and the lowest after 55.
Therefore, fellow men should have a long snack. The age of men is also important. Both men and women should keep their biological clocks!
However, men also play an important role in the process of bearing children. The quality of male sperm even affects the quality of fetus.
For men's reproductive years, some people say that there is no ceiling. Is there any scientific basis for this statement?
Some experts in Germany have done an experiment to divide men into young group and old group, and test their sperm quality respectively. As a result, the sperm of the old group did not age obviously.
In other words, there is a scientific basis for men's unlimited reproductive years. In ancient China, it was recorded that children were born in their eighties, and in modern times, there was news that men in their sixties or even seventies were fathers.
Although male sperm is not aging, its activity is obviously reduced and the number of malformations is also increased.
That is to say, although men can have children when they are old, the quality of having children will never catch up with that when they are young, and men also have the best childbearing age.
Unlike women, the best time for men to have children is 30 to 35 years old. Men's bodies mature later than women's and reach their peak at the age of 30.
In the next five years, men are full of energy and have high sperm quality, which can be defined as the best reproductive time.
After the age of 35, the vitality of male sperm gradually decreases. Although women can still get pregnant, the quality is not as high as before.
If men want a healthy baby, they can put the issue of childbearing on the agenda when they are around 30 years old.
It has long been recorded in China ancient books that "an 80-year-old man gives birth to a child", and there are living examples in modern times. For example, an old man in Sweden lived 120 years old, remarried at the age of 85, and gave birth to eight children; In the former Soviet Union, there was a farmer named Ahanher Buchana who got married and gave birth at the age of 1 12, which is probably the Guinness Book of Records for the birth of the oldest man in the world.
Although there are many examples of being a father at an advanced age, fertility is not equal to fertility quality. With the increase of men's age, the worse the sperm quality, the more genetic variation. Men over 50 years old will bring a lot of trouble and even disaster to eugenics.
35 years old is the watershed of male sperm quality. Taking sperm quality as an example, although the sperm of elderly men are not aging and have high density, the rate of gene variation in sperm is greatly increased, the sperm motility is obviously decreased, and the number of immobile and abnormal sperm will increase by 20%.
The quality of sperm is poor, even if it is fortunate to combine with eggs to form fertilized eggs, such embryos are prone to miscarriage and abortion.
Therefore, although the reproductive life of men is much longer than that of women, it is almost a lifetime, but from the perspective of eugenics, it is better to have children at the best age! Eugenics is inseparable from the "seed" of the father.
I'm glad to answer this question for you. Let's walk into this problem together. Now let's discuss it together.
I would like to share my personal views and thoughts with you on this issue. I hope my sharing is helpful to you and you will like my sharing.
I think it is in theory. Normal men, no matter how old they are, have the ability to make normal women pregnant, which means that men's reproductive years are not capped. And women have menopause, also known as menopause. Most women are between the ages of 45 and 55, and the ovaries will gradually stop ovulating and lose their ability to conceive.
But the fact is that male fertility will also decrease with age. The most obvious thing is that the older men are, the worse the sperm quality will be, which will affect the quality of embryos. There are also related studies showing that older men and women are related to abortion. Clinically, we also found that the older the male, the lower the sperm quality and the higher the abnormal sperm or dead sperm rate. Therefore, the best reproductive age for men is usually 32 years old.
The answers to this question shared above are all personal opinions and suggestions. I hope the answer to this question I shared can help everyone.
When you are old, you can let your wife conceive naturally. One of the necessary conditions is that their reproductive system is aging slowly and their semen is still in the normal range. It usually contains nine indicators:
1, semen volume. The dose of normal people is about 2-6ml each time (usually abstinence for 3-7 days). If the amount exceeds 7ml at a time, the sperm density decreases and it is easy to flow out of the vagina, resulting in a decrease in the total number of sperm, which is common in seminal vesiculitis; Less than 2ml means too little semen. At this time, the contact area between semen and female genital tract is small, or the viscosity is not conducive to sperm entering the woman's cervix, leading to infertility, which is common in low testosterone level, ejaculatory duct obstruction, retrograde ejaculation and so on.
2. Sperm density. The sperm density of normal people is 20 million-1.500 million /ml, which varies greatly among individuals. Those below 20 million /ml are oligozoospermia, which can be seen in spermatogenic dysfunction caused by various reasons, and basically cannot conceive naturally; More than 250 million /ml is polyspermia, and the sperm will be too crowded to affect the activity and it is difficult to get pregnant.
3. Liquefaction. After normal semen injection, it becomes gelatinous under the action of seminal vesicle coagulase, and becomes a less viscous liquid after 5-30 minutes. If it does not liquefy for more than half an hour, it means that semen does not liquefy and sperm cannot move freely, leading to male infertility.
4. Deformity rate. The head of normal sperm is oblate and oval, and the tail is long and curved, similar to tadpoles; But some are pointed, big and double-headed, and the tail is short, forked and double-tailed. If these abnormal sperm exceed 30% of the total, it is abnormal spermatozoon, which will lead to infertility.
5. color. The color of normal semen is grayish white or yellowish. If there is bloodshot in semen, it will turn red or pink, which is bloody semen, common in inflammation of accessory gonads and posterior urethra, and occasionally seen in tuberculosis or tumors; If the semen contains yellow secretion, it is purulent semen, suggesting that there is inflammation in the reproductive tract or accessory gonads.
This statement is not correct. When a man is over 50 years old, his sperm will age, have poor vitality, and form a fertilized egg with the egg, which will easily lead to poor quality of the fertilized egg and the possibility of chromosome variation.
Evolutionarily speaking, male sperm has always been active, which can increase the population and contribute to the growth of one's own tribe. Wars often occurred in ancient times, and men were the main force of wars, which would reduce the number of men. In order to have more offspring, men need sperm to remain active all the time.
There are many news in the news that some old people in their seventies and eighties are happy to be fathers. In India, a 93-year-old man named Lagaf announced that he was a father, which is called Guinness World Records: the oldest newborn father has virtually become a man's capital. In fact, the latest childbearing age of men depends on their ejaculation ability.
Compared with women, men's reproductive age is declining slowly. Women usually go through menopause around the age of 50, and men are still fertile at this age. In theory, men can ejaculate until they are 80 years old. With the increase of age, sperm quality will gradually decline.
The best reproductive age for men is around 32 years old, when the sperm quality in men is the highest.
If you pay attention to the maintenance of your body, you may still have high sperm quality in your later years.
In order to maintain sperm vitality, it is best to eat some high-quality foods from protein, such as eggs and milk, to maintain sperm vitality in the body. Usually take less hot baths, and sperm are particularly sensitive to high temperature.
The older you are, the greater the chance of miscarriage, which will easily lead to conflicts between husband and wife and lead to the breakdown of the relationship. ② There may be abnormal sperm or dead sperm. ③ There is a great relationship between child mortality and sperm quality. For the sake of children's health, children should not be born too late.