...} and {{TextTerm|sisters|3|113|IndexEntry=sister}}, without distinction of sex, are called {{TextTerm|sibs|4|113|IndexEntry=sib}} or {{TextTerm|siblings|4 ...ion. Sometimes consideration is restricted to lines of descent through one sex only, thus a {{TextTerm|male generation|4|116|OtherIndexEntry=generation, m

...ratio|5|320|OtherIndexEntry=ratio, sex}} is the ratio of the number of one sex to that of the other; the ratio of the number of men to the number of women {{Note|2| {{NoteTerm|sex}} n. — {{NoteTerm|sexual}} adj.}}

...tion used to be made between a {{TextTerm|live birth|4|601|OtherIndexEntry=birth, live}} resulting in the delivery ({{RefNumber|60|3|4}}*) of a {{TextTerm|l {{Note|3| It is becoming more and more common, to use the term {{NoteTerm|birth}} to mean live births in view of the introduction of the term {{NoteTerm|la

...i.e., 15 or 20 to 44 or 49, is used as an index of fertility when reliable birth statistics are not available. ...fic birth rates|8|631|2|IndexEntry=age-specific birth rate|OtherIndexEntry=birth rate, age-specific}}. Here again, births arc usually taken to mean live bir