逆行月经

【医】 regurgitant menstruation

逆行的英语翻译：

go in the wrong direction; regression; retrogradation; retrograde; stem
stem against; thrash
【机】 back; back run; backing

月经的英语翻译：

menses; menstrual flow; menstruation
【医】 catamenia; courses; emmenia; flow; flowers; lunaria; meno-; menorrhea
menses; menstrual flow; menstrual flux; menstruation; monthlies
monthly sickness; regel