The scope of potential fertility issues for pediatric cancer patients is broad and difficult to predict. Both genders are susceptible to central dysregulation of the hypothalamic axis. For boys, chemotherapy and radiation can affect production of both sex hormones and sperm. These effects can be reversible or permanent. For girls, the ovary can be similarly affected, with inadequate or absent h...

The letter written by Heinze (1) has serious shortcomings. Heinze wrote that There is not a single study of healthy men from any fertility center or sperm bank that has reported a decline in sperm counts in the United States. This is not true. A number of such studies exist. Leto and Frensilli (2) documented a decline in sperm counts in potential sperm donors from all over the United States in ...

Fertility reduction due to sub-fertile males is a major concern in breeder flocks. Phenotypic traits of broiler breeder males and their relationships with fertility can be used as reliable indicators for identification and removal of sub-fertile males from the breeder flocks. This study was conducted to investigate semen traits (semen volume, sperm motility, sperm viability and sperm count) and...

The letter written by Heinze (1) has serious shortcomings. Heinze wrote that There is not a single study of healthy men from any fertility center or sperm bank that has reported a decline in sperm counts in the United States. This is not true. A number of such studies exist. Leto and Frensilli (2) documented a decline in sperm counts in potential sperm donors from all over the United States in ...

Geographical variations in fertility have been observed within several countries in Northern Europe, with higher fertility in rural areas, smaller settlements and city suburbs. However, the processes underlying such fertility variations across residential contexts are not well understood. This paper contributes to the on-going debate by looking at local variations in fertility in Britain. It ai...

There have been important changes in the United Kingdom’s (UK) fertility and immigration in the past decade, with a large share contributed by migrants from Poland. A detailed understanding of Polish migrant fertility is lacking, however, because the relevant data are not routinely collected. This paper provides new insights into the fertility patterns of Polish migrants in the UK, and compares...

The letter written by Heinze (1) has serious shortcomings. Heinze wrote that There is not a single study of healthy men from any fertility center or sperm bank that has reported a decline in sperm counts in the United States. This is not true. A number of such studies exist. Leto and Frensilli (2) documented a decline in sperm counts in potential sperm donors from all over the United States in ...

The onion maggot, Delia antiqua, is a devastating pest of liliaceous crops and current control measures fail to avert pesticide residues, threats to agroecosystem, and costly expenditures. Insect growth regulators (IGRs) are used as trypetid pest chemosterilants for their suppression on adult fertility and fecundity, but their effects on onion flies are unknown. Here, three IGRs (lufenuron, cyr...

The efficiency of milk production in pasture-based systems is heavily influenced by calving pattern, necessitating excellent reproductive performance in a short-breeding season. Where grazed pasture is the major component of the diet, cows are underfed relative to their intake potential. The cow responds by reducing milk output, but fertility is generally better than high intake confinement sys...

PURPOSE For young women who were diagnosed with cancer prior to having children, reproductive potential might affect the quality of life (QoL). This systematic review looks at fertility issues in young female cancer patients, focusing on their influence on psychological well-being, specific fertility-related interventions and reproductive decisions. METHODS Thirteen medical and social science...