A sex ratio is the ratio of males to females in a population. Birli explained by Fisher's principle, for evolutionary reasons this is typically about 1:1 in species which reproduce sexually.Bunun taraf? ke?ik, han?mlarda alt mide kaslar?n?n istem d??? ?ekilde kas?larak ili?kiyi hüzünl?, vecal? ve kâh bile imkâns?z hâle getiren vajinismus ve fa