The legal age for marriage in Ghana should be raised from 18 to 23, chief government statistician Philomena Nyarko has said.
This would make women better prepared, physically and mentally to have children, she said.
It could also slow population growth in Ghana by 15% to 20%, Ms Nyarko added.
Her proposal comes as MPs in Nigeria are debating whether to scrap the 18-year age restriction for marriage so that people can wed earlier.
Some Muslim MPs argue that the restriction violates Islamic law, which allows marriage at the age of puberty.
Nigeria, Africa’s most populous country, is roughly divided between Muslims and Christians