Practical Effects of Young Female Marriage in the Middle Ages
Question
It is becoming a global norm, at least in the West, that marriage should not be legal for any person under 18 years of age. This global (Western) standard is based on various practical and moral concerns.
In Judaism it was customary for at least 1000 years during the Middle Ages to marry the girls very early in teenage. (I don't know if average marrying ages are known for the more ancient times, long before the Middle Ages.) As there is such a vast amount of experience on the practice, one wonders if Jews encountered and documented any of the perceived modern practical or moral risks becoming reality. For example, there is a belief that having children in teenage is risky for the mother. I wonder if statistical information exists (or discussion about the topic in Medieval times), from which it would be possible to assess any excess mortality (or lack thereof) related to Jews marrying very young. Or do the historical records look like everything was OK, and girls marrying very young had no such adverse effects, which would have been noticed and documented by anyone?