Where does “postmenarche” come from?

postmenarche (English) comes from English post, from Middle French poste, from Italian posta, from Latin probāre, from Latin probō, from Latin Probus, from Proto-Indo-European pro-bhwo-, from Proto-Indo-European pro- — passed , crossed.

Ancestry of “postmenarche”, step by step

postmenarche traces back through two separate lines of ancestry.

via English post

StepLanguageWordMeaning
1EnglishpostA long dowel or plank protruding from the ground;...
2Middle Frenchposte
3Italianpostamail, post; post office; stakes
4Latinprobāre
5Latinprobōto approve, permit, commend
6LatinProbusgood, serviceable, excellent, superior, able
7Proto-Indo-Europeanpro-bhwo-being in front, prominent
8Proto-Indo-Europeanpro-toward, forward
9Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
10Proto-Indo-Europeanper-before, in front; first; to go through
11Proto-Indo-Europeanpr̥tóspassed , crossed

via English menarche

StepLanguageWordMeaning
1EnglishmenarcheThe onset of menstruation; a girl's first period
2GermanMenarchemenarche onset of menstruation
3Ancient GreekμήνAttic form of μείς; used to strengthen...
4Proto-Hellenicménsmonth; the visible moon
5Proto-Indo-Europeanmḗh₁n̥smoon; month
6Proto-Indo-Europeanmeh₁-to measure
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European por-