منابع مشابه
Male fertility and infertility
in 30–50% of sub-fertile couples the male partner has poor semen quality, either because of low sperm count, poorly motile sperm or sperm with abnormal size and shape (morphology). This may result from inherent genetic factors, poor pre-natal testicular development or adult exposure to gonadotoxic agents. There are few proven therapies to improve semen quality. Therefore, the number and quality...
متن کاملInfertility, Fertility Drugs, and Ovarian Cancer
Many couples faced with infertility are treated with ovulation induction medications, often referred to as fertility drugs. These medications (such as clomiphene citrate) may help a patient to ovulate who previously was not ovulating or, when given empirically, may induce one or two more follicles to be produced each cycle than the customary one. The second class of fertility drugs (gonadotropi...
متن کاملMale infertility, female fertility and extrapair copulations.
Females that are socially bonded to a single male, either in a social monogamy or in a social polygyny, are often sexually polyandrous. Extrapair copulations (EPC) have often been suggested or rejected, on both empirical and theoretical grounds, as an important mechanism that enables females to avoid fertility risks in case their socially bonded male is infertile. Here, we explore this possibil...
متن کاملEffects of infertility insurance mandates on fertility.
Infertility currently affects over 6 million individuals in the United States. While most health insurance plans nationwide do not cover infertility diagnoses or treatments, to date 15 states have enacted some form of infertility insurance mandate. In this paper, I use data from the Vital Statistics Detail Natality Data and Census population estimates to examine whether these state-level mandat...
متن کاملThe Y chromosome and male fertility and infertility.
Since 1995, thanks to a large number of studies, Y chromosome microdeletion screening has become part of the routine diagnostic work-up of severe male factor infertility. Many initial contradictory issues such as variability in deletion frequency, markers to be tested, presence of deletions in 'fertile' men, and genotype-phenotype correlation has been resolved. Past and present unresolved issue...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of Medicine
سال: 1969
ISSN: 0035-9157
DOI: 10.1177/003591576906200118