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Semen quality Semen is initially a coagulum that liquefies in 5-25 minutes due to prostatic enzymes. Clinical Asst Professor, Obstetrics and Gynecology. CASA measures the following parameters: Curvilinear velocity – The average distance per unit time between successive sperm positions) Straight-line velocity – The speed of forward direction Linearity – The straight-line velocity divided by the curvilinear velocity In addition, the program measures the average path velocity, the amplitude of lateral head displacement, and the flagellar beat frequency, and it is used to evaluate for evidence of hyperactivation. Are Sequence Family Variants Useful for Identifying Deletions in the Human Y Chromosome? (PDF, 377 KB) The American Journal of Human Genetics, 2004.

For a woman to conceive, certain things have to happen: vaginal intercourse must take place around the time when an egg is released from her ovary; the system that produces eggs has to be working at optimum levels; and her hormones must be balanced.[54] For women, problems with fertilisation arise mainly from either structural problems in the Fallopian tube or uterus or problems releasing eggs. The epididymis additionally secretes substances for sperm nutrition and protection such as glycerophosphorylcholine, carnitine, and sialic acid.

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If you and your partner agree, extra embryos can be frozen and saved to use later. Some respond by actively avoiding the issue altogether; middle-class men are the most likely to respond in this way.[21] In the United States some treatments for infertility, including diagnostic tests, surgery and therapy for depression, can qualify one for Family and Medical Leave Act leave. In a third of cases, the reason lies only with the man; in another third, it is because of the woman; and in the rest of the cases, it is a combination of both, or the cause is unknown. There's a link between increased temperature of the scrotum and reduced semen quality, but it's uncertain whether wearing loose-fitting underwear improves fertility.  Testicles The testicles produce and store sperm.

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Paternal age > or = 40 years: an important risk factor for infertility. Risk factors for both men and women are the same and these include age, stress, being underweight or overweight, diet, smoking, alcohol and drugs. Gonadotropins can trigger ovulation when Clomid or Serophene don't work.

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6 Women with risk factors for tubal obstruction, such as endometriosis, previous pelvic infections, or ectopic pregnancy, should instead be offered hysteroscopy or laparoscopy with dye to assess for other pelvic pathology. Types of Infertility There are two types of infertility: primary and secondary. They can interfere with implantation or block the fallopian tube, preventing sperm from fertilizing the egg. By the end of this step, most of healthcare professionals will be able to sketch out their provisional diagnosis. Assessment of efficacy of varicocele repair for male subfertility: a systematic review. Feedback inhibition is from testosterone and inhibin. In my case, the inability to conceive was the result of a condition called stage 4 endometriosis. Normal Pregnancies Resulting from Testicular Sperm Extraction and Intracytoplasmic Sperm Injection for Azoospermia Due to Maturation Arrest. (PDF, 6 MB) Fertility and Sterility, 1996. Are Sequence Family Variants Useful for Identifying Deletions in the Human Y Chromosome? (PDF, 377 KB) The American Journal of Human Genetics, 2004.