Infertility is the inability to conceive a child within 1 year. A variety of factors contribute to infertility, including genetics, health conditions, and lifestyle choices. And while infertility may be traced to a single cause in either you or your partner, it can also be caused by a combination of factors, from infection to stress to medications.
Sexual impotence is a common problem that affects men and is sometimes the result of psychological disorders such as depression, and hypertension; both of which lead to a lowered sexual drive and erectile dysfunction.

CAUSES
-Male infertility is most commonly linked to the use of drugs and/or alcohol, psychological disorders, diabetes, thyroid and other illnesses.
-Varicocele is a common cause of male infertility -- a condition where the veins in the spermatic cord in the scrotum become abnormally dilated and tortuous.
-Duct blockage – Infection like gonorrhea, TB, filariasis; on surgery for hernia/hydrocele may lead to blockage of the passage between the testes and the penis. In this case sperms will be absent from the semen (azoospermia).
-Hormonal imbalance
-Testicular factors – like twisting of testis leading to compromised blood supply; undescended testes when the testes lie in the abdomen; and damage due to exercise
-Heat can decrease sperm production. Testes lie outside the body in the scortum because they can produce sperms in a cooler environment. So clothes like tight jeans, nylon briefs, and hot baths/saunas, lead to damage to sperm production.
-Effect of long term medication
-Abnormal Semen, Abnormal Sperm
-Germ-Cell Aplasia
-Low Semen Production, Low Sperm Motility, Low Sperm Count (Oligospermia)
Research shows that men who consume large amounts of alcohol can impair their fertility. A heavy drinker may end up with a damaged liver. Estrogen levels rise in men with liver damage, which can often cause impaired sperm production.

HOME REMEDIES

The first one is garlic and is an excellent home remedy to treat impotency. It is completely natural and serves as an aphrodisiac. Hygrophila spinosa, a herb known for its aphrodisiac activities since ancient times is a content of most powerful herbal aphrodisiac agent and also is a good male enhancement herb. Asian Ginseng has been used for centuries in India and China as an aphrodisiac. Carrots are considered valuable in impotence. For better results, about 150 gm of carrots, chopped finely, should be taken with a half-boiled egg, dipped in a tablespoon of honey, once daily for a month or two. This even brings about an increase in sexual stamina. Horny goat weed is also known as natural Viagra containing constituents which increases the levels of nitric oxide in the system allowing more blood to flow to the penis. Orchis mascula is a powerful herb that is extensively used in preparing aphrodisiac agents and Low Sperm Motility.This herb is very helpful in enhancing the desire for intercourse and also is helpful in improving the sperm count. Tribulus terrestris (gokhru or gokshur), a herb is very responsible for inducing new energies and enthusiasm in your body. It is also helpful in provoking your hidden desires for love indulgence and also increases your energies to last longer in bed. The consumption of onion is known to increase the strength of the reproductive organs and one's libido. The white variety of onion is considered a more potent and useful source. Lady's fingers are another tonic for improving sexual vigor. A person, who takes five to ten grams of the root powder of this vegetable with a glass of milk and two teaspoons of ground mishri daily, will never lose sexual vigor. Ginkgo Biloba an ayurvedic herb that is known to be a very good stimulant for maintenance of healthy sperm count as well as helps in impotency. Mucana pruriens – An herb popularly known as kapikathu is an excellent aphrodisiac agent. This herb is responsible in increasing libido as well as evoking the desire for mutual indulgence with your counter part. Kapikathu is considers the best herb that increases both sperm count as well as the quality of the sperms. The dried roots of asparagus (Safed Musli) are aphrodisiac. Fifteen grams of roots boiled in one cup of milk should be taken twice daily. The regular use of this remedy is valuable in impotency and premature ejaculation.

Black raisins are useful for restoration of sexual vigor. They should be boiled with milk after being washed thoroughly in tepid water. After consuming these raisins one must drink milk. Starting with 30 gm of raisins, followed by 200 ml of milk three times daily, the quantity of raisins should be gradually increased to 50 gm each time.

The juice extracted from ginger is a valuable aphrodisiac and beneficial in the treatment of sexual weakness. For better results, half a teaspoon of ginger juice should be taken with a half-boiled egg and honey, once daily night, for a month. It is said to relieve impotency, premature ejaculation, and spermatorrhoea.

Dried dates are also known to be highly beneficial for impotency. They can be used by pounded and mixing them with almonds, pistachio nuts, and quince seeds in equal quantities, about 100 gm should be taken daily as an effective medicine for increasing sexual power. Therefore is a very beneficial home remedy in impotency in males.

Tongkat Ali a plant that helps in the impotency by acting as a natural testosterone booster.
In addition to these herbal supplements, there are a variety of different vitamins and amino acids that men can take to help improve impotency.

L-Arginine, for example, is a key amino acid that allows the penile blood vessels to relax. Similarly Propionyl-L-Caritine is another example of an amino acid that is used to treat Erectile Dysfunction and impotency. These vitamins also increase blood flow and improve nervous reactions.

Along with these measures on must also keep a calm mind and should avoid the consumption of alcohol and cigarettes completely.