REF Article: Coomarasamy, Arri & Williams, Helen & Truchanowicz, Ewa & Seed, Paul & Small, Rachel & Quenby, Siobhan & Gupta, Pratima & Dawood, Feroza & Koot, Y & Bender Atik, Ruth & Bloemenkamp, Kitty & Brady, Rebecca & Briley, Annette & Cavallaro, Rebecca & Cheong, Ying & J Chu, Justin & Eapen, Abey & Ewies, Ayman & Hoek, Annemieke & Rai, Rajendra. (2015). A Randomized Trial of Progesterone in Women with Recurrent Miscarriages. The New England journal of medicine. 373. 2141-2148. 10.1056/NEJMoa1504927.