abstract:Marriageable age (or marriage age) is the age at which a person is allowed by law to marry, either as a right or subject to parental or other forms of consent. Age and other prerequisites to marriage vary between jurisdictions, but generally is set at eighteen.
For first-born children, the sex ratio was normal 105 baby boys to 100 baby girls (since boys are slightly more vulnerable to childhood diseases, this ratio provides for equal numbers at marriageableage).