OBJECTIVE To study the presentation, management and outcome of undescended testes in children in a northern Nigerian population. DESIGN Retrospective study. SETTING Ahmadu Bello University Teaching Hospital, Zaria, Nigeria. SUBJECTS Thirty six children aged < or = 12 years with 43 undescended testes managed in 10 years. INTERVENTIONS Orchidopexy, orchidectomy, herniotomy. RESULTS The ...

Testes size often predicts the winner during episodes of sperm competition. However, little is known about the source of nutrients allocated to testes development, or testes plasticity under varying nutrient availability. Among many holometabolous insects, metabolic resources can derive from the larval or adult diet. Distinguishing the source of nutrients allocated to testes can shed light on l...

Swerdlow et al studied a cohort of 1075 men who had been treated for cryptorchidism. In 120 testes that had been biopsied at the time of orchiopexy the relative risk of subsequent development of testicular cancer was 66.7. The corresponding relative risk in 1285 undescended testes that had also been operated on but not biopsied was 6.7. The estimate for testes that were not biopsied is about as...

There is strong evidence that polyandrous taxa have evolved relatively larger testes than monogamous relatives. Sperm size may either increase or decrease across species with the risk or intensity of sperm competition. Scorpions represent an ancient direct mode with spermatophore-mediated sperm transfer and are particularly well suited for studies in sperm competition. This work aims to analyze...

The objective of this study was to evaluate the imputation accuracy of parent-offspring trios under different scenarios. By using simulated datasets, the performance Bayesian LASSO in genomic prediction was also examined. The genome consisted of 5 chromosomes and each chromosome was set as 1 Morgan length. The number of SNPs per chromosome was 10000. One hundred QTLs were randomly distributed a...

Revolution and Family in Rural China: Influence of Family Background on Current Family Wealth This paper examines the influence of family human capital on offspring’s economic status in post reform rural China by concentrating on the father-son relationship. We focus on two indicators of family background: family class origin (jiating chengfen) and occupational experience. The results of a fami...

This article studies the effect of parental background on the educational attainment of the offspring. In particular, it compares the effects of parental occupation and education and investigates whether the relative importance of these resources have shifted over time. In addition, this article studies, which parent has the strongest effect on the offspring’s education. Using data for the Neth...

Introduction: There are several evidences that show various environmental stresses during pregnancy, affect physiological behavior of the offspring. In this study the effects of REM (Rapid Eye Movement) sleep deprivation of pregnant rats on spatial learning of adult male offspring by Morris water maze were investigated. Methods: Water tank technique was used for inducing REM sleep deprivatio...