2,058. Female Anatomy Explained Allegorically

Hilchos Issurei Biah 5:3

The Sages spoke allegorically about a woman: the uterus, where a fetus is created, is “the source.” This is the place from which blood that renders a woman a niddah or a zavah originates. It’s also called “the room” because it’s deep inside her body. The uterine canal, the entrance of which constricts during pregnancy and opens wide at birth, is called “the anteroom” because it’s like an entryway to the uterus.

Hilchos Issurei Biah 5:4

When a man’s organ is fully inserted during intimacy, it enters the “anteroom” but it doesn’t reach the end. Rather, it is distanced from the end based on an individual’s unique dimensions. Above and between the “room” and the “antechamber” is where the ovaries and the fallopian tubes are located. This is referred to as “the upper level.” There is an opening called the “passage” that leads from the “the upper level” to the top of the “anteroom.” When the man’s organ is fully inserted during intimacy, it extends beyond the “passage.”