what is human sterility and other informations about it?
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Human is said to be sterile when he cannot produces sperms /or she caanot produce eggs,they can feel real sex pleasure and natural functions but with out production
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A rough indication is the number of base pairs in the organism's DNA sequence.  It will be a slight overestimate of the organism's complexity because some of the genome is redundant.  So since there are 4 different bases and there are 3 billion base pairs in the human genome, and 4=2^2, there are 6 billion bits of information in the human genetic make-up.  If it seems incredible to you that the information to create something as complex as a human could easily be stored on a CD, some of the structures in a human body are highly repetitive.  Remember, all this information can be condensed into one sperm and one egg.  Centuries ago we'd reached the stage where an average person's cultural complexity, that is, their knowledge, language and memories, exceeded their physiological complexity.
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Sexual reproduction in plants is described in Wikipedia as;\n\nIn flowering plants, a stamen produces gametes called pollen grains, which attach to a pistil, in which the female gametes (ovules) are located. Here, the female gamete is fertilized and develops into a seed. The ovary, which produced the gamete then grows into a fruit, which surrounds the seed(s). Plants may either self-pollinate or cross-pollinate.\n\nYou can also find out more here \nhttp://en.wikipedia.org/wiki/Plant_sexuality
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* Population\n* Pollution\n* Aids/HIV
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Try to find information you are looking for in this article:\nhttp://encarta.msn.com/encyclopedia_1741500824/United_States_(People).html#p9\nIt has many facts about US population.
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The pheromones you are asking about are extracted from various animals ,like pigs, so I don't really understand how they would function for humans.  Pheromones are chemicals released by the body.  \n\nIn most animals pheromones are important signals for reproductive behaviors, and they may also be used to mark territories, identify individuals, and indicate aggression or submission.  Although systems of pheromones are well developed in many animals, their importance to humans is not clear.\n\nThere is one researcher that I know of named Martha McClintock.  She mainly studies the pheromones found in human females that are associated with menstrual synchrony and suppression.  The theme of her research is behavioral regulation of fertility and how social interactions (pheromones) can affect neural and endocrine function.  \n\nI don't think that there are any human pheromones on the market, only those of animals.  In addition, each person has their own unique chemosensory communication, and pheromones are said to be odorless.\n\nI hope this helps answer your question.  Try reading up on Martha McClintock for a more in depth understanding about human pheromones.
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"The term "hermaphrodite" has historically been used to describe people with ambiguous genitalia or biological sex. The broader term intersexual is often used and is preferred by many such individuals and medical professionals. The term is still used by the pornography industry, though often as a synonym for transsexual, as true human intersexuals are rare."\n\nIntrasexuality is not necessarily chimerism and chimerism is not necessarily intarsexuality or hermaphroditism\n\n"Tetragametic chimerism is a less common cause of congenital chimerism. It occurs through the fertilization of two ova by two spermatozoa, followed by the fusion of the zygotes and the development of an organism with intermingled cell lines. This happens at a very early stage of development, such as that of the blastocyst. Such an organism is called a tetragametic chimera as it is formed from four gametes — two eggs and two sperm.\n\nAs the organism develops, the resulting chimera can come to possess organs that have different sets of chromosomes. For example, the chimera may have a liver composed of cells with one set of chromosomes and have a kidney composed of cells with a second set of chromosomes. This has occurred in humans, though it is considered extremely rare."\n\n"Affected persons are identified by the finding of two populations of red cells or ambiguous genitalia and hermaphroditism alone or in combination; such persons sometimes also have patchy skin or eye pigmentation. If the blastocysts are of the same sex, it can only be detected through DNA testing, which itself is currently rare, and it may be more common than currently believed. If the blastocysts are of opposite sex, genitals of both sexes are formed, either ovary and testis, or combined ovotestes, in one rare form of intersexuality, a condition previously known as true hermaphroditism. As of 2003, there were about 40 human cases in the literature, according to New Scientist.\n\n\n\n\nAccording to the New England Journal of Medicine, vol 338, p 166, physicians in the Western General Hospital of Edinburgh have reported on a child with a penis, one testicle, and an ovary and fallopian tube instead of a second testicle. Some of this child's body cells are XY (male), and some are XX (female). The child was conceived as the result of in-vitro fertilization, and it appears most likely that two embryos, a male embryo and a female embryo, fused before or soon after embryos were transferred to the mother's uterus.\n\nThis kind of condition, where there is more than one set of cell lines with different sets of chromosomes making up the body is known as chimerism. This kind of tetraploid chimerism can also occur naturally, without in-vitro fertilization (see New England Journal of Medicine, vol 346, p 1545).\n\nNot all cases of Chimerism involve intersexuality, however. There have been about 40 known cases worldwide of humans reproducing naturally and producing offspring with absolutely no genetic similarities between mother and child. Discovery Health Channel has produced a documentary on two families and their issues in dealing with chimerism. It was called "I Am My Own Twin.""
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Hi there,\n\nThanks for your question. To answer your question with some questions...here we go:\n\n- How does culture effect our views of human sexuality?\n- How has our understanding of sexual orientation changed in the past century?\n- Should governments have any say into people's sexual lives?\n- Should chemical castration be enforced on convicted sexual abusers?\n- Why has female sexual development been relatively under-researched as compared to male sexual development?\n- What are the primary concerns of legalizing same sex marriage?\n- Should intersex and hermaphrodite infants undergo surgery to define their sexual genital expression?\n- How should marriage be defined?\n\nHope these questions help! Good luck!
972437
how do we fight an infection?\nhow do we get energy?\nhow do we absorb nutrients?\nhow do we reproduce?\nhow fast do we grow?\nhow do we see things?\nhow do we hear things?\nhow do we remember things?
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Biologically man has p**** and woman has v*****.
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Tubal sterilization is a surgical operation. It closes off the fallopian tubes, where eggs are fertilized by sperm. When the tubes are closed, sperm cannot reach the egg, and pregnancy cannot happen. \n\nSterilization does not affect femininity. Sterilization will not affect your sexual organs, or your sexuality. No glands or organs will be removed or changed. All of your hormones will still be produced. Your ovaries will release an egg every month. Your menstrual cycles will most likely follow their regular pattern. \n\nSterilization is more than 99 percent effective. In very rare cases, tubes may reconnect by themselves, and pregnancy may occur. Such rare pregnancies may develop outside the uterus (womb) and require emergency surgery. \n\nYou must consider the operation permanent. You and your partner will need no other birth control method after a successful tubal sterilization. It may be possible to reverse the operation in some cases, but your decision not to have a child in the future must be firm. You must be absolutely sure you will never change your mind or regret your choice - no matter how your life changes. \n\nSterilization will not cause symptoms of menopause (change of life) or make menopause happen earlier. \n\nYour partner also may want to consider sterilization. Sterilization for men is called vasectorny. Vasectomy is simpler, costs less, and has fewer risks than tubal sterilization. Vasectomy also must be considered permanent however, so think carefully about what sterilization will mean for both of you before you make your decision. \n\nHOW IS IT PERFORMED?\n\nThe procedure requires a small incision in the abdominal area near the navel and sometimes a second small incision near the pubic hairline. The surgeon inserts a slender instrument (laparoscope) and seals the fallopian tubes so that eggs can no longer pass through to become fertilized. The procedure takes about 20-30 minutes, and patients rest in a recovery room for 1-2 hours. For women seeking first-trimester abortion and tubal ligation, Planned Parenthood offers these two procedures as a combined service on the same day. \n\nDOES THE OPERATION HURT? \n\nIf you have your tubal ligation at the Planned Parenthood clinic, you will be given local anesthesia and IV sedation to help you relax, but you will not be asleep. You may feel some mild discomfort during the operation. If you prefer to be completely asleep during the surgery, a gynecologist from Planned Parenthood will perform the tubal ligation under general anesthesia at a nearby hospital. \n\nWHO WILL PERFORM MY OPERATION?\n\nThe procedure is performed by a female Board-certified gynecologist experienced in laparoscopic tubal ligation procedures. \n\nWHAT WILL THE SURGERY BE LIKE?\n\nThe surgery consists of the following steps: \n\nIV is started, medications given. \nAn instrument called a uterine elevator is inserted into the vagina. \nUnder local anesthesia, the physician will make an incision approximately 3/4" at the umbilicus (belly button). \nThrough the incision a harmless gas (carbon dioxide) is passed to inflate the abdomen and isolate the fallopian tubes. \nA laparoscope is inserted through the incision with allows the M.D. to visualize the fallopian tubes. \nOnce the tubes have been isolated and anesthetized a grasping rod is passed through the laparoscope. A low voltage current is emitted from the rod, sealing each fallopian tube. \nAll instruments are removed; a bandaid is placed to cover the incision which has been sealed with 2-3 dissolvable stitches. \nThe entire procedure will take an average of 25-40 minutes. Throughout the procedure, pressure and moderate abdominal cramping may be felt along with discomfort associated with anesthesia administration in cervix (needlestick). Additionally, there may be a small to moderate amount of vaginal bleeding, cramping and bloating 1-3 days after the procedure. \nHOW DO I PREPARE FOR THE SURGERY?\n\nAt a clinic visit before the surgery
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Female Reproductive System.\n\nDescription:\nThis is the human's reproductive system, that is capable of producing a new being to the world. This is situated in the female gender of any species. (But we do find certain exceptions like, Sea Horses, where the female sea-horse simply produces the eggs, yet hands them over to the male sea-horse to take care of! mostly mistaken to believe that male sea-horses do have a reproductive system.) Its the only natural way of reproducing a specific being to the world.(Their are other ways, to reproduce species, in a lab i.e. cloning, tube.) \n\nBenifit:\nReproduction of a specific specie would keep them away from the Red-Data-Book, where all the endangered species are listed.\n\nThis is a very basic explanation.\n\nHope it is helpful!\nGood Luck!
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At thirteen, usually!\nIt is a flush of an un fertilized egg produced by female.\nOf course, only female produce eggs.\nIn human if it is fertilized then it will become baby.
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sexual education, aids and STD's, sexuality, eating habits and hygiene issues
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your answer should be --- mamalian or human reproduction. depends on if this is a question for a subject being studied or not, and what subject it is.\n\nbecause the zygote is the cell that is formed by the fusion of two haploid gametes, one from a male and one form a female.\n\nafter the first diploid cell is created, it is no longer reproduction, but embryonic development, since there are more than one cell once they start dividing, and they all are diploid.\n\nin most other reproductive processes, the gametes contain more than one set of chromosomes, making the gametes polyploid rather than haploid, therefore, the zygote isn't diploid.
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http://en.wikipedia.org/wiki/Human_cells
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Human fertility funding will assure that those people willing to go to great lengths to have a child will be among the ones populating the world. These people will be more likely to provide advantages to a child, which will make it a more productive citizen.\n\nWith the falling rates of fertility in industrialized nations, the rate of reproduction will be much higher in poorer nations, therefore reducing the ratio of well-educated to poorly educated people, leading to an overall decline of quality of life worldwide. With fertility research, this ratio will be improved. (Doesn't mean those people will help anyone else, but it's a decent argument anyway.)\n\nThose two are the only ones I can come up with off the top of my head. You've got a tough position to support, but, as Rob Schneider says, "You can do eeeet."