If the sperm are still swimming actively, this means that they have the ability to survive in vitro for this period- and this is reassuring. If, however, none of the sperm are alive after 24 hours, this suggest that they may be functionally incompetent. Sperm Penetration Assay (SPA, Hamster Assay) Since the basic function of a sperm is to fertilize an egg, scientists were very excited when they found that normal sperm could penetrate a denuded (zona-free) hamster egg. A zona-free hamster egg is obtained from hamsters egg. A zona-free hamster egg is obtained from hamsters and the covering (the zone) removed by using special chemicals. The egg are then incubated with the sperm in an incubator in the laboratory. After 24 hours, the eggs are checked to ascertain how many sperm have been able to penetrate the egg. The result gives a penetration score, which gives an index of the sperm’s fertilizing potential. This is a very delicate technique and is not available in India. In any case, nowadays scientists the world over are quite disenchanted with the test, since the correlation between IVF results (the ability to fertilize human eggs) and the SPA (the ability to penetrate zona-free hamster eggs) is quite poor.
In conclusion, treatment of rats with Maca at high altitude prevented high altitude-induced spermatogenic disruption. Effect of alcoholic extract of Lepidium meyenii ( Maca ) on testicular function in male rats. Universidad Peruana Cayetano Heredia, Postal Office Lima, Peru. To evaluate the effect of the alcoholic extract of Lepidium meyenii (Maca) on the spermatogenesis in male rats. In Holtzman rats, Maca alcoholic extract (5 %) was given by oral route at doses of 48 mg/day or 96 mg/day for 7 days, 14 days and 21 days. Testicular function was assessed by measurements of lengths of different stages of seminiferous epithelia and by epididymal sperm count. RESULTS: Ethanolic extract of Maca increased the length of stages IX-XI of seminiferous epithelium at treatment day 7, day 14 and day 21. Progression of spermatogenesis was evident only after day 21 when lengths of stages XII-XIV of seminiferous epithelium were increased; at day 7 and day 14, no important change in spermatogenesis was observed. Epididymal sperm count was increased with 48 mg/day at all times. With 96 mg/day an increase in sperm count was observed at day 7, but it was reduced at day 14 and day 21 of treatment. In the acquired type of male orgasmic disorder, the patient will have had the previous experience of normal sexual function. In these cases, it is usually a situational factor that precipitates the disorder. Diagnosis The diagnosis is usually readily made on the basis of the patient's history and the presence of the DSM-IVTRdiagnostic criteria. Male orgasmic disorder may be part of a complex of sexual malfunctioning that may include erectile dysfunction, abnormalities in ejaculation (such as premature ejaculation or retrograde ejaculation), and hypoactive sexual desire disorder. In order to differentiate between the various potential disorders, the physician may request laboratory tests and/or may perform further diagnostic evaluations. Blood plasma levels of testosterone are of help in diagnosing hypogonadism. A number of tests of thyroid, pituitary and adrenal function are available to diagnose hormonal abnormalities of those glands. A test for nocturnal penile erections may be performed to diagnose erectile dysfunction. Treatments If an extrinsic mechanism is discovered as the cause of the orgasmic disorder, steps should be taken to eliminate or ameliorate the problem. An example would be substance or alcohol abuse or the use of certain provocative medications. RESULTS: Baseline total testosterone and bioavailable testosterone were respectively 4.2 (0.5) nmol/l and 1.7 (0.4) nmol/l. After a month of testosterone, delta value analysis between testosterone and placebo phase showed that mean (SD) trough testosterone concentrations increased significantly by 4.8 (6.6) nmol/l (total testosterone) (p = 0.05) and 3.8 (4.5) nmol/l (bioavailable testosterone) (p = 0.025), time to 1 mm ST segment depression assessed by Bruce protocol exercise treadmill testing increased by 74 (54) seconds, and mood scores assessed with validated questionnaires all improved. Compared with placebo, testosterone therapy was also associated with a significant reduction of total cholesterol and serum tumour necrosis factor alpha with delta values of -0.41 (0.54) mmol/l and -1.8 (2.4) pg/ml respectively. Testosterone replacement therapy in hypogonadal men delays time to ischaemia, improves mood, and is associated with potentially beneficial reductions of total cholesterol and serum tumour necrosis factor alpha. Physiological testosterone replenishment in healthy elderly men does not normalize pituitary growth hormone output: evidence against the connection between senile hypogonadism and somatopause. Normal aging in men is accompanied by lower serum testosterone, GH, and IGF-I concentrations. The mechanisms of the age-related diminution in the activity of the somatotropic axis (somatopause) are uncertain. Several explanations have been proposed, including a lower hypothalamic GHRH output. The aim of the present study was to test the hypothesis that the physiological hypogonadism that accompanies normal aging is responsible for GHRH deficiency. We assessed the suppressibility of spontaneous and GHRH-stimulated GH secretion by a specific competitive GHRH receptor antagonist in seven elderly (61-76 yr old) and six young (20-23 yr old) healthy nonobese men.
If possible, avoid interrupting your man's concentration as the stages unfold. Using techniques that both of you know and like is fine, but unexpected, dramatic maneuvers at the point of orgasm are more likely to distract than accentuate. Moving a lot falls into that category. Simply stand back, as it were, and let his orgasm happen. It's not the time to get fancy or creative, says Carl. Again, a dilemma: How do you find new ways to push your man over the top without interrupting his orgasmic concentration? Realize that you have to choose some nights to experiment and others to go for the peak experience. Love him to death. The biggest secret about men's orgasms, I think, is that they reveal how vulnerable we are. That's why they're so sensitive to the environment; slight changes in the wind can turn a 10-gun salute into a popgun. Because more semen is being ejaculated your orgasm will also last longer. Improved Fertility In order to fertilize an egg a large amount of sperm is required, many hundreds of millions. While the average man can produce this many sperm multiples times per day, there are some external factors that can adversely affect the sperm count. Things such as smoking, drug use, poor diet, lack of exercise, and even wearing tight clothing in the groin area can all decrease the sperm count. Increasing the volume of your sperm increases your fertility by increasing the number of sperm that are produced during each ejaculation. If you are trying to have children, the number of sperm you ejaculate is quite important, as is their condition. You need high quality sperm and more of it. Female Sex Enjoyment When you ejaculate, your penis pumps semen, which many men and women find pleasurable. When you increase the amount you ejaculate the pleasurable pumping feeling lasts longer, and also increases your partners pleasure. More sperm during oral sex can be pleasurable and satisfactory for both you and your partner.
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