sentences:  In order to gain freedom, "nobi" could purchase it, earn it through military service, or receive it as a favor from the government.In 1426, Sejong the Great enacted a law that granted government "nobi" women 100 days of maternity leave after childbirth, which, in 1430, was lengthened by one month before childbirth.In 1434, Sejong also granted the husbands 30 days of paternity leave.