Algorithm for Consideration of the Use of Progestins for Reducing the Risk of Preterm Birth (PTB). Aif Transvaginal Ultrasound (TVU) Cervical Length (Cl) Screening is Performed. B17- Hydroxyprogesterone Caproate (17-P) 250 mg Intramuscularly Every Week from 16-20 to 36 Weeks, if Selected Weighing the Risk and Benefits of Research to Late Discussed on the Prior Page. Cfor Example, Daily 200-mg Suppository or 90-mg Gel from Time of Diagnosis of Short Cl to 36 Weeks

Algorithm for Consideration of the Use of Progestins for Reducing the Risk of Preterm Birth (PTB) Aif Transvaginal Ultrasound (TVU) Cervical Length (Cl) Screening is Performed. B17- Hydroxyprogesterone Caproate (17-P) 250 mg Intramuscularly Every Week from 16-20 to 36 Weeks, if Selected Weighing the Risk and Benefits of Research to Late Discussed on the Prior Page. Cfor Example, Daily 200-mg Suppository or 90-mg Gel from Time of Diagnosis of Short Cl to 36 Weeks

Reprinted from Society for Maternal-Fetal Medicine. Progesterone and preterm birth prevention: translating clinical trials data into clinical practice. Am J Obstet Gynecol. 2012;206(5):376-386. Copyright © 2012 Elsevier. With permission.

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Figure 6-2.