1. sex ratio
2. Sex ratioSex ratio is the ratio of males to females in a population. The primary sex ratio is the ratio at the time of conception, secondary sex ratio is the ratio at time of birth, and tertiary sex ratio is the ratio of mature organisms. The human sex ratio is of particular interest to anthropologists and demographers. In humans the secondary sex ratio is commonly assumed to be 105 boys to 100 girls (which sometimes is shortened to "a ratio of 105").
Read “Sex ratio” on English Wikipedia
Read “性比” on Japanese Wikipedia
Read “Sex ratio” on DBpedia
Read “Sex ratio” on English Wikipedia
Read “性比” on Japanese Wikipedia
Read “Sex ratio” on DBpedia
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