Quick Transmigration: Binding a Child-Bearing System to Conquer Infertile Villains

(The order of worlds is not fixed. This novel is essentially a feel-good story, so please be kind, dear readers.)

After Bai Yuzhi died from an illness, she was bound to a system and gained a "good pregnancy" golden finger. As long as she could bear children for the infertile, twisted villains in various worlds who wanted to destroy the world, she would have a chance to return to the real world and regain a healthy body. Her transmigration identities are always beautiful yet low-status cannon fodder, destined to be stepping stones for the protagonists' growth.

World 1: The tyrannical emperor who unified the world and achieved millennia of glory but struggled with heirs vs. the stunning palace maid who climbed into his dragon bed (Completed, not mutually pure).

World 2: The interstellar emperor with the strongest genetic grade but an extremely low probability of fertility vs. the beautiful slave with inferior genes (Ongoing, mutually pure).

World 3: The apocalypse lord whose powers could destroy heaven and earth but suffered from infertility vs. the useless vase whose power was to become beautiful.

World 4: The Human Emperor with a true golden dragon form who was childless because mortal women couldn't withstand him vs. the peerless courtesan offered to him.

World 5: The CEO who ruled a trillion-dollar business empire but was drugged, making it difficult to have children vs. the fake young lady who was kicked out of the wealthy family.

World 6: The foreign king who could lift tripods, vied for supremacy, but was cursed to have no children vs. the delicate Central Plains princess sent for a political marriage after defeat (Completed, not mutually pure).

World 7: To be determined.