What types of treatments should I consider before pregnancy to avoid loose skin?

Unfortunately, no great clinical studies exist, showing the use of any products that reduce the likelihood of loose skin and stretch marks after pregnancy.
However, it is certainly reasonable to consider often hydration of the abdominal skin often as well as support of the abdomen with a binder particularly in the third trimester to potentially alleviate some of the pressure on the skin, and prevent stretch marks.

There are a few things you can do to help get your skin in optimal condition as you plan for pregnancy. Eat a healthy, balanced diet and drink plenty of water. Continue this while pregnant and follow the advice of your obstetrician regarding healthy weight gain. Use hydrating creams and lotions and wear sunscreen daily. Morpheus8 is a great tool that combines RF technology with microneedling to improve overall skin tone and texture. Best wishes to you!