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Ongoing Pregnancies and Birth after Intracytoplasmic Sperm Injection with Frozen-thawed Epididymal Spermatozoa. (PDF, 442 KB) Human Reproduction, 1995. If you’re having trouble conceiving, you are certainly not alone. Some systems enable a fast repositioning and very short time for fixation of less than 0.

Anovulation can also cause cessation of periods (secondary amenorrhea) or excessive bleeding (dysfunctional uterine bleeding). Fertilization takes place outside the body, and the fertilized egg is reinserted into the woman's reproductive tract, in a procedure called embryo transfer. 6 Accuracy may be improved by use on midday or evening urine specimens, which correlate better with the peak in serum luteinizing hormone levels. Patients who do not ovulate because of a fault in the pituitary gland may receive this drug as an injection.

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Kidney Transplantation in Inbred Rats. (PDF, 6 MB) The American Journal of Surgery, 1973. The acrosome, a derivative of the Golgi process, surrounds the nucleus anteriorly and contains enzymes necessary to penetrate the ovum.

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Hormonal Problems A small percentage of male infertility is caused by hormonal problems.  The hypothalamus-pituitary endocrine system regulates the chain of hormonal events that enables testes to produce and effectively disseminate sperm.  Several things can go wrong with the hypothalamus-pituitary endocrine system: · The brain can fail to release gonadotrophic-releasing hormone (GnRH) properly.  GnRH stimulates   the hormonal pathway that causes testosterone synthesis and sperm production.  A disruption in   GnRH release leads to a lack of testosterone and a cessation in sperm production. · The pituitary can fail to produce enough lutenizing hormone (LH) and follicle stimulating hormone   (FSH) to stimulate the testes and testosterone/sperm production.  LH and FSH are intermediates   in the hormonal pathway responsible for testosterone and sperm production. · The testes� Leydig cells may not produce testosterone in response to LH stimulation. · A male may produce other hormones and chemical compounds which interfere with the   sex-hormone balance. A thorough physical exam can detect varicocele and give clues to hormone problems. Disorders of sexual differentiation result in infertility (eg, hermaphroditism, pseudohermaphroditism).

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Normal Pregnancies Resulting from Testicular Sperm Extraction and Intracytoplasmic Sperm Injection for Azoospermia Due to Maturation Arrest. (PDF, 6 MB) Fertility and Sterility, 1996. As the major causes of infertility are sperm abnormalities, ovulation dysfunction, and fallopian tube obstruction, the preliminary adviced investigations for the infertile couple should be focused on semen analysis (to be compared with the WHO reference values [27]), detection of ovarian function by hormonal assay (early follicular FSH and LH levels, and mid-luteal progesterone), and evaluation of tubal patency by hysterosalpingography (HSG) [17-32], (Appendix 3). Listen to Mr Brook talk about male infertility Find out more about ICSI. Several days later, embryos -- or fertilized eggs -- get put back into your uterus with a device called an intrauterine insemination catheter. Ovarian Transplantation between Monozygotic Twins Discordant for Premature Ovarian Failure. (PDF, 315 KB) The New England Journal of Medicine, 2005. The mature oocytes are put onto a special culture medium and stored in the incubator. Ideally, the cause of the infertility is reversible and then conception can result from natural sex. 21,22 Evaluation of Women Jump to section + The etiology of female infertility can be broken down into ovulation disorders, uterine abnormalities, tubal obstruction, and peritoneal factors. The ovulation induction agents used include clomiphene citrate, hMG, hCG, recombinant FSH, and recombinant LH. Placenta Percreta Invading Bladder. (PDF, 2 MB) The Journal of Urology, 1973. Is there a way to increase a couple’s chance of getting pregnant?