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Medical conditions Some medical conditions can affect fertility. Key to the diagnosis of male infertility is a semen analysis, which assesses primarily sperm numbers, sperm movement and sperm form. 0 Definition of Sterility and Infertility With regard to terminology, infertility has to be distinguished from sterility. Between 45 and 50 percent of cases are thought to stem from factors that affect the man. BMI (body mass index) may be a significant factor in fertility, as an increase in BMI in the male by as little as three units can be associated with infertility. Epididymal Extravasation Following Vasectomy as a Cause for Failure of Vasectomy Reversal. (PDF, 22 MB)Fertility and Sterility, 1979.

Mutations in the Cystic Fibrosis Gene in Patients with Congenital Absence of the Vas Deferens. (PDF, 5 MB) New England Journal of Medicine, 1995. There are three main types of fertility treatment: medical treatment (such as ovulation induction therapy); surgical treatment (such as laparoscopy and hysteroscopy); and the different assisted reproduction techniques [37]. 44 Therefore, a simple recommendation is for vaginal intercourse every two to three days to optimize the chance of pregnancy.

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Microscopic Vasovasostomy and Spermatogenesis. (PDF, 1 MB) The Journal of Urology, 1977. A Physical Map of the Human Y Chromosome. (PDF, 160 KB) Nature, 2001.

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Microsurgery and Andrology. (PDF, 5 MB) Chapter from textbook, 1991. Some causes, such as hyperprolactinemia, are reversible with proper treatment. 0 To assess the causative factors of sterility in a man, a semen analysis is performed.

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Today, assisted reproductive techniques (ARTs) offer powerful new options. Treatment of the cause: 30. Unexplained infertility: - Ovarian stimulation should not be considered as does not improve pregnancy or birth rates. - Advise to try to conceive for two years of unprotected sexual intercourse before other options. - After two years of failure to conceive, consider IVF/ICSI. Diverse Spermatogenic Defects in Humans Caused by Y Chromosome Deletions Encompassing a Novel RNA-binding Protein Gene. (PDF, 7 MB) Nature Genetics, 1995. We get information regarding the woman's potential for adequate ovarian stimulation with medications by counting antral follicles. These assistance devices are not bound by the restrictions of common medical robotic systems. IVF involves removal of eggs directly from the ovary, fertilization with sperm in the laboratory, followed by transfer of the embryos directly into the uterus, thereby bypassing the tubes. Blood tests Depending on the individual couple's situation, various blood tests on either the female or the male may be needed. Signs of infertility in men Signs of infertility in men can include the following: Hormonal imbalances A doctor can test for infertility in men. Congenital Absence of the Vas Deferens: The Fertilizing Capacity of Human Epididymal Sperm. (PDF, 3 MB) New England Journal of Medicine, 1990. Semen is the milky fluid that a man's penis releases during orgasm. Basal body temperatures are no longer considered a reliable indicator of ovulation, and are not recommended for evaluating ovulation. Fertilizing Capacity of Epididymal and Testicular Sperm using Intracytoplasmic Sperm Injection (ICSI). (PDF, 7 MB)Reproduction, Fertility and Development, 1995.