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Epididymal and Testicular Spermatozoa and Intracytoplasmic Sperm Injection. (PDF, 7 MB) Assisted Reproduction Reviews, 1996. Without an erection, it is difficult for a man to release sperm inside the vagina—and, therefore, difficult to get a woman pregnant.

Factors Affecting Fertility: Timing of Intercourse Intercourse prior to ovulation is key to maximizing the chance of pregnancy. Algorithm for infertility evaluation. (ART = assisted reproductive technology.) Lifestyle Factors Jump to section + All couples should be counseled to abstain from tobacco use, limit alcohol consumption, and aim for a body mass index less than 30 kg per m2 to improve their chances of natural conception or using assisted reproductive technology. Studies on Testicular Biopsies from Vasectomized Men. (PDF, 18 MB) Chapter 21 from Vasectomy: Immunologic and Pathophysiologic Effects in Animals and Man, 1979.

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Environmental vs Genetic Sex Determination: A Possible Factor in Dinosaur Extinction? (PDF, 307 KB) Fertility and Sterility, 2004. Infertility is more likely in men who have had this condition. PID is a major cause of tubal infertility and can lead to ectopic pregnancy, which may further damage the reproductive system. For women, being underweight and having extremely low amounts of body fat are associated with ovarian dysfunction and infertility and they have a higher risk for preterm birth. Hereditary causes: due to chromosome or genetic abnormalities. An evaluation by a physician is the only way to sort it out.

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Testosterone is a key hormone for male fertility, so problems with the testes that produce this hormone may lead to infertility. Fertility treatments for women Fertility drugs might be prescribed to regulate or induce ovulation. Treatment of tubal obstruction generally requires referral for subspecialty care. Human menopausal gonadotropins Crowe discovered that the gonads were under the control of the anterior hypophysis. [175] Zondek and Aschheim discovered that FSH and LH were responsible for the development of the gonads in immature animals and confirmed Crowe's work. [135, 136] In the 1930s, ovulation induction was attempted by using gonadotropins from a mare, but its use was discontinued because of the development of antibodies. [176, 177] Borth et al demonstrated the effect of FSH and LH extracted from menopausal urine. [178, 179] Gemzell reported the first ovulation induction using human pituitary gonadotropin in 1958, and the first pregnancy was reported in 1960. [180, 181] Lunenfeld reported preliminary results using hMG; however, in 1963, it was definitely established as a real ovulation induction agent. [182, 183, 184] Human menopausal gonadotropin (hMG [eg, Repronex, Menopur]) contains 75 U of FSH and 75 U of LH per mL, although the concentration may vary among batches (ranges from FSH at 60-90 U and LH at 60-120 U).

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Bushnik T, Cook JL, Yuzpe AA, Tough S, Collins J. The night before the procedure, the patient must take 2 tablespoons of sodium bicarbonate. Vasectomy and its Microsurgical Reversal. (PDF, 17 MB) Urologic Clinics of North America, 1978. For a man to be fertile, the testicles must produce enough healthy sperm to be ejaculated effectively into the woman's vagina. If the obstruction is caused by salpingitis isthmica nodosa or fibrosis, the best results are achieved through IVF. [142] Surgical preparation for IVF While the surgeon should be as conservative as possible, he or she should consider that the patient is better served with a single well-functioning fallopian tube than with 2 defective tubes, which elicits an increased risk for ectopic pregnancy or recurrence of pelvic adhesions. Couples will have to consider the ethical and emotional aspects of this procedure. The woman may be given a low dose of ovary stimulating hormones. If an endocrinopathy, such as hyperprolactinemia, is diagnosed, the underlying cause should be treated. IUI increases the number of the sperm in the fallopian tubes, where fertilization takes place. Your doctor may suggest that you take gonadotropin if you have unexplained infertility or when other kinds of treatment haven't helped you get pregnant. Preconception lifestyle advice for people with subfertility.