A powerful empire rules this world, which is divided into several sections. Each section is ruled and governed by various noble families, under the rule of the royal family led by the king and queen. Each family competes for power and seek any advantage they can get over their rivals. Magic has returned to the world and is present today. However, it is slow and complicated, requiring years of study and resources. As a result, mages are highly valuable and sought after.
An entrepreneurial mage has invented an artificial womb by combining magic with technology, allowing for the potential for children to be created in batches. Sperm and egg cells are taken from donors and grown within these artificial womb casings, which provide the blood pump, blood oxidizer, hormone regulator, etc. This has now seen widespread use...by those who can afford it. Gone are the days in which women had to risk their lives in childbirth to produce an heir, who may end up dying by disease or misadventure. They can now be easily grown or replaced, making the traditional nine month burden a more streamlined process. Children can be produced by the dozens, with the richest being able to produce hundreds at a time.
Wealthy families and nobility have adopted the technology for themselves, as practicality eventually overrides moral concerns. However, my concern is that this tech kind of cheapens the nobility of a bloodline if children can be mass produced like this. Bloodlines are important to families, similar to the times of Europe, and determine your station in life and access to resources.
How can noble families preserve the honor and integrity of their bloodline when children can be easily produced?