postmenstrual
/ˌpəʊs(t)ˈmɛnstrʊəl/ /ˌpəʊs(t)ˈmɛnstrʊl/Medicine
adjective
Occurring or existing after menstruation. Later also: designating the age of a fetus or infant as reckoned from the first day of the mother's last menstrual period before pregnancy.
Origin
Mid 19th century; earliest use found in The Lancet. From post- + menstrual.