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What Forms of Male Infertility are there left to Cure? (PDF, 2 MB) Human Reproduction, 1995. The sperm can either be mixed with the eggs to allow normal fertilization (conventional insemination) or by injecting one sperm into each mature egg (ICSI). Problems with sperm If a man makes too few sperm or none at all, the woman cannot become pregnant.

Women are advised not to use the drug for more than one day. Gonadotrophins for idiopathic male factor subfertility. When the eggs are mature, your doctor collects them with a device called a vaginal ultrasound probe.

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Quantitative Evaluation of Spermatogenesis by Testicular Histology in Men with Congenital Absence of the Vas Deferens Undergoing Epididymal Sperm Aspiration. (PDF, 3 MB) Human Reproduction, 1990. Abundant Gene Conversion Between Arms of Palindromes in Human and Ape Y Chromosomes. (PDF, 340 KB)Nature, 2003.

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After all, the necessity of reproduction is one of the few things on which both Darwin and the Bible agree. Abnormalities may be a sign of a primary hypothalamic, pituitary, or testicular problem.Causes Causes generally can be divided into pretesticular, testicular, and post-testicular. Depending on the therapeutic agent and the duration of treatment, endometriosis can be treated with oral contraceptives, progestins, androgens, or GnRH agonists. Treatment of Tubal and Peritoneal Factors The treatment of tubal-factor infertility underwent major changes, especially during the last quarter of the century when microsurgery became available. [126, 127] Tubal reconstruction was the only hope for those patients before assisted reproductive therapy became available.

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Assisted conception The following methods are currently available for assisted conception. If you and your partner agree, extra embryos can be frozen and saved to use later. GIFT (gamete intrafallopian tube transfer) and ZIFT (zygote intrafallopian transfer).  Like IVF, these procedures involve retrieving an egg, combining it with sperm in a lab, and then transferring it back to your body. They can include: Changes in hair growth Changes in sexual desire Pain, lump, or swelling in the testicles Problems with erections and ejaculation Small, firm testicles   When to See the Doctor If you are under 35 and have been trying to get pregnant without success for a year, see your doctor. The most common technique of artificial insemination in human beings is intrauterine insemination. However, these tests have only poor to moderate predictive value despite widespread use. Ejaculation disorders: If the ejaculatory ducts are blocked, semen may be ejaculated into the bladder Hormonal imbalance: Hypogonadism, for example, can lead to a testosterone deficiency. Testicular Transplantation and Autotransplantation. (PDF, 8 MB) Chapter 22 of textbook, Extracorporeal and Microvascular Surgery, 1982. In some cases, the reproductive urologist can improve semen function by recommending certain lifestyle changes, by hormonal treatments, or by surgery. Classic Klinefelter syndrome has a 47, XXY karyotype and is caused by a nondisjunction during the first meiotic division, more commonly of maternal origin; mosaic forms are due to nondisjunction following fertilization. The elevated temperature hinders the maturation process of sperm, which develop best in an environment that is slightly cooler than body temperature. A Series of Monozygotic Twins Discordant for Ovarian Failure: Ovary Transplantation (Cortical versus Microvascular) and Crypreservation. (PDF, 791 KB) Human Reproduction, 2008.