Sheng nu cites studies that show that women are now breaking the tradition of "mandatory marriage" to have fewer children or marry later on in life. Other typologically similar terms that are still used in the modern lexicon of other countries and cultures show the concept has existed in some cases as far back as the 16th century. The term spinster was used to describe unmarried or single women of a marriageable age. It wasn't until 2004 when the Civil Partnership Act replaced the word spinster with "single" in the relationship history section of marriage certificates in the UK. Subsequently, at the
Spinster and invisibility came from assumptions made by others." Women may not marry for a variety (and/or combination) of reasons, including personal inclination, a dearth of eligible men (whose numbers can decrease dramatically during wartime) and socio-economic conditions (that is, the availability of livelihoods for women). Writer and spinster Louisa May Alcott famously wrote that "liberty is a better husband than love to many of us". Social status issues could also arise where it was unacceptable for a woman to marry below her social rank but her parents lacked the funds to support a marriage within their social rank. The First