Dear Editor Now there are three ways to select the sex of the fetus before implantation (1, 2). Two of these methods are scientifically proven that are used in the fertility and infertility centers (3). Two types of pre implantation methods (PGD and Ericsson method) used for social sex selection. Both of them are based on actively rendering the second sex chromosome to be either a Y chromosome ...

Previous research based on analysis of fertility behavior and expressed preferences shows that many Australian parents want both a son and a daughter. However, most respondents to a representative survey of Australians did not approve of IVF or abortion for sex-selection purposes, and most did not think a hypothetical blue or pink pill to select sex of a child should be legal.

Selection is expected to maintain primary sex ratios at an evolutionary equilibrium. In organisms with temperature-dependent sex determination (TSD), targets of sex-ratio selection include the thermal sensitivity of the sex-determining pathway (hereafter, sex determination threshold) and nest-site choice. However, offspring sex may be canalized for nests located in thermally extreme environment...

HE mode of sex determination in Drosophila melanogaster leads to a MenTdelian expectation of a 1 : 1 sex ratio. However, in Drosophila numerous deviations from this expectation have resulted from a wide variety of mechanisms. These fall into three main categories: aberrant meiotic segregation, gametic selection and zygotic selection. Cases involving aberrant sex-chromosome segregation have been...

Complete sex chromosome dosage compensation has more often been observed in XY than ZW species. In this study, using a population genetic model and the chicken transcriptome, we assess whether sexual conflict can account for this difference. Sexual conflict over expression is inevitable when mutation effects are correlated across the sexes, as compensatory mutations in the heterogametic sex lea...

1. Classic evolutionary models interpret ageing as a cost of reproduction, but evolutionary research has thus far largely neglected the conceptual links between the evolution of ageing and a key mode of selection on male and female reproductive strategies – sexual selection and sexual conflict. 2. We synthesize ideas and evidence linking sex and ageing, and make the case that a focus on this fa...