title: The epigenetic environment: secondary sex ratio depends on differential survival in embryogenesis: comment 1.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Gutiérrez-Adán
mesh_terms: D047108:Embryonic Development; D044127:Epigenesis, Genetic; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D012744:Sex Ratio