Who believes in progesterone?

Who believes in Crinone (vaginal progesterone suppository gel)??? My friend says her and her sister swear by it as they both have a history of early miscarriage, but my doctor says there's no evidence as to it helping.
Thoughts? Any advice for using it? 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors