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The sperm must provide the zygote with DNA, centrioles, and activation factor for the embryo to develop. Medical conditions Some medical conditions can affect fertility.

Assisted hatching: The embryologist opens a small hole in the outer membrane of the embryo, known as the zona pellucid. While these injuries are rare, significant complications can occur, and they are primarily related to the umbilical insertion site.

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Microsurgical Solutions to Male Infertility. (PDF, 2 MB) Contemporary OB/GYN, 2005. 10 Data Sources: A PubMed search was completed using the key terms infertility, subfertility, treatment, etiology, and diagnosis. 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).

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Source : Medications Used With Infertility Treatment PPT Presentation Summary : Medications Used with Infertility Treatment. The basic work-up, or fertility evaluation, includes: Semen analysis of the male partner. A Modern View of Male Infertility. (PDF, 7 MB) From The Infertile Male: Advanced Assisted Reproductive Technology, 1994. As the amount of adipose tissue increases, there is more aromatase available to convert androgens, and serum estradiol levels increase. In many cases, cornual obstruction diagnosed on HSG represents simple cornual spasm.

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However, given that fertility in women is known to decline steadily with age, some providers evaluate and treat women aged ≥35 years after 6 months of intercourse without the use of contraception (1). In response to FSH stimulation at puberty, germ cells become spermatogonia and undergo an ordered maturation to become spermatozoa. Microsurgery Successful in Vasectomy Reversals. (PDF, 156 KB) The New York Times, 1975. The success rate of tubocornual anastomosis ranges from 20-58%. The main side effects are hot flushes, gastrointestinal events (nausea and vomiting), headache, back pain, and leg cramps.