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Microsurgical Aspects of Varicocele. (PDF, 9 MB) Fertility and Sterility, 1979. Vasectomy Reversal. (PDF, 733 KB) The New England Journal of Medicine, 1977. Varicocele and male factor infertility treatment: a new meta-analysis and review of the role of varicocele repair. Primary vs. secondary infertility[edit] Primary infertility is defined as the absence of a live birth for women who desire a child and have been in a union for at least 12 months, during which they have not used any contraceptives.[14] The World Health Organisation also adds that 'women whose pregnancy spontaneously miscarries, or whose pregnancy results in a still born child, without ever having had a live birth would present with primarily infertility'.[15] Secondary infertility is defined as the absence of a live birth for women who desire a child and have been in a union for at least 12 months since their last live birth, during which they did not use any contraceptives.[15] Thus the distinguishing feature is whether or not the couple have ever had a pregnancy which led to a live birth. Treatment of tubal obstruction generally requires referral for subspecialty care.

Secondary infertility When a woman is unable to bear a child, either due to the inability to become pregnant or the inability to carry a pregnancy to a live birth following either a previous pregnancy or a previous ability to carry a pregnancy to a live birth, she would be classified as having secondary infertility. Fertility treatment with donor eggs is usually done using IVF. KU School of Medicine Source : Are Twins An Adverse Outcome After Infertility Treatments?

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High Fertilization and Pregnancy Rate after Intracytoplasmic Sperm Injection with Spermatozoa Obtained from Testicle Biopsy. (PDF, 3 MB) Human Reproduction, 1995. There are tests that may tell if you have fertility problems. Pro-life opposition to the destruction of embryos not transferred in vivo.

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Because ovarian hyperstimulation syndrome does not occur, the patient's response is slow. But anything within a few days of that can be considered normal, as long as those cycles are consistent. Hormone changes Signs of hormonal changes can be nonspecific, and a person may not notice them or know the underlying cause.

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Patients who are suffering from Stein-Leventhal syndrome (also referred to as polycystic ovary syndrome, or PCOS) can also suffer from anovulation.[3] Up to 90% of cases of anovulation are caused by PCOS; this syndrome is usually hereditary.[4][5] Weight loss or anorexia can also cause hormonal imbalance, leading to irregular ovulation (dysovulation). They can be blocked due to numerous causes, including infections,  trauma or abnormal development, such as with cystic fibrosis or similar inherited conditions. 4) In Vitro Fertilization (IVF): In vitro means “outside the body.” IVF is a process whereby eggs are collected and then fertilized by sperm outside the body, in an embryology laboratory. Normal Pregnancies Resulting from Testicular Sperm Extraction and Intracytoplasmic Sperm Injection for Azoospermia Due to Maturation Arrest. (PDF, 6 MB) Fertility and Sterility, 1996. Normal sperm have a smooth oval head approximately 3-5 μm long and 2-3 μm wide.