"Weeping uterus" is a metaphorical term sometimes used to describe menstruation. It refers to the shedding of the uterine lining when pregnancy does not occur. In simpler terms, it's another way of thinking about menstrual flow.
According to one perspective, "menstruation is the 'weeping of a disappointed womb,' when pregnancy does not occur." (02-Oct-2013). This suggests a figurative interpretation where the uterus, having prepared itself for a potential pregnancy, "weeps" or releases its built-up lining when fertilization doesn't happen.
In summary, the phrase poetically describes the regular process of menstruation as a response to the absence of pregnancy.
