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A Physical Map of the Human Y Chromosome. (PDF, 160 KB) Nature, 2001. Preliminary Tests of a New Reversible Male Contraceptive in Bush Dog, Speothos Venaticus: Open-ended Vasectomy and Microscopic Reversal. (PDF, 106 KB) Journal of Zoo and Wildlife, 2006. Article Sections Infertility is defined as the inability to achieve pregnancy after one year of regular, unprotected intercourse.

Hormonal abnormalities can sometimes be treated with medicine or surgery. Sperm Granuloma and Reversibility of Vasectomy. (PDF, 11 MB) Lancet, 1977. These include: Infrequent menstrual periods: When a woman has regular menstrual periods, defined as regular cycles occurring every 21 to 35 days, this almost always indicates that she ovulates regularly. Guidelines and recommendations were retrieved from the best evidence reviews at the American College of Obstetricians and Gynaecologists (ACOG), American Society for Reproductive Medicine (ASRM), Canadian Fertility and Andrology Society (CFAS), European Society of Human Reproduction and Embryology (ESHRE), Human Fertilisation and Embryology Authority (HFEA), Royal College of Obstetricians and Gynaecologists (RCOG), and the World Health Organization (WHO). A karyotype test and a Y chromosome test for microdeletions are indicated in patients with nonobstructive azoospermia or severe oligospermia (< 5 million sperm/mL), although indications are expanding.[20] Klinefelter syndrome Klinefelter syndrome is the most common chromosomal cause of male infertility, estimated to be present in 1 per 500-1000 male births.

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It is more successful in women who have previously been pregnant. Renal Echinococcus. (PDF, 1 MB) The Journal of Urology, 1972. Fibroids that distort the uterine cavity have an impact on the ability of an embryo to implant and should be removed surgically. The Male-specific Region of the Human Y Chromsome is a Mosaic of Discrete Sequence Classes. (PDF, 754 KB) Nature, 2003. In my case, the inability to conceive was the result of a condition called stage 4 endometriosis.

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IVF is Generally Performed in the Following Manner: The woman undergoes gonadotropin injections, which stimulate the ovaries to produce many eggs. Results of one study investigating a cohort of 315 men revealed changes within the hinge region of SF-1 and no rare allelic variants in fertile control men.

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Microscopic Vasoepididymostomy: Specific Microanastomosis to the Epididymal Tubule. (PDF, 15 MB) Fertility and Sterility, 1978. The laparoscope aids diagnosis or therapeutic interventions with a few small cuts in the abdomen.[1] Laparoscopic surgery, also called minimally invasive surgery (MIS), bandaid surgery, or keyhole surgery, is a modern surgical technique. Ideally, the test should be performed at least twice to confirm results. In addition to a careful history, a physical evaluation may also be performed. Having an irregular cycle, including missing periods, can contribute to infertility, as it means a woman may not be regularly ovulating.