Progesterone:

PRISM study – https://www.nejm.org/doi/full/10.1056/NEJMoa1813730?query=featured_home

Infographic to show to anyone who won’t take you seriously:

Click to access PRISM%20Infographic_v4_1.pdf

Info from Tommys: https://www.tommys.org/about-us/charity-news/giving-some-pregnant-women-progesterone-could-prevent-8450-miscarriages-year-say-experts#:~:text=Researchers%20at%20Tommy’s%20National%20Centre,babies%20being%20born%20each%20year.