Bound to a Childbearing System, Climbing the Ranks Is This Easy

[Quick transmigration + childbearing + fixed couple + both leads are each other's one and only + sweet romance + palace and household intrigue + putting scumbags in their place]

Du Sinan is a newly recruited, overlooked member of the Childbearing Department, diligently carrying out her missions.

Business has been booming in the Childbearing Department lately. For some reason, a number of the Rescue Department's targets have become unable to have children. Because of the special nature of these missions, some members of the Childbearing Department need to take on two roles and carry out Rescue Department missions as well.

(Fixed couple + both leads are each other's one and only. Since this includes a harem story, here's an explanation: For various reasons, the male lead has been diagnosed with fertility problems and may even be unable to have children. Due to his personality, he has never been with anyone else!)

(The bodies the female lead transmigrates into are designed by the System according to her own physical information. She will never take over someone else's body!)

World One: The beautiful, delicate darling of an emperor with no heirs