biostudies-literatureUnknown208(6)Romero RIntramural NIH HHSAmerican journal of obstetrics and gynecology421-6https://www.ebi.ac.uk/biostudies/studies/S-EPMC4120746biostudies-literatureProgesterone is not the same as 17α-hydroxyprogesterone caproate: implications for obstetrical practice.PMC4120746Z01 HD002401-15Stanczyk FZRomero RfalseProgesterone is not the same as 17α-hydroxyprogesterone caproate: implications for obstetrical practice.2013-01-01T00:00:00Z2013 Jun2025-04-18T15:06:43.45Z2025-04-07T01:41:30.222ZS-EPMC41207462364366910.1016/j.ajog.2013.04.027