What are some possible ways to lower the maternal mortality rate in undeveloped nations

Some possible ways include:
Improving the medical care available to expectant mothers before, during, and after childbirth.

More resources, such as food, clean water, and other necessary supplies being given to both the mothers and their families.

Vaccines and other disease-preventing methods being used to protect both the mother and the child.

The first and the last ones sort of go together, but they should still work as separate points. Hope this helped!