Abstract
Objective: The objectives of the study was to determine whether salivary progesterone (P) or estriol (E3) concentration at 16-20 weeks' gestation predicts preterm birth or the response to 17α-hydroxyprogesterone caproate (17OHPC) and whether 17OHPC treatment affected the trajectory of salivary P and E3 as pregnancy progressed. Study Design: This was a secondary analysis of a clinical trial of 17OHPC to prevent preterm birth. Baseline saliva was assayed for P and E3. Weekly salivary samples were obtained from 40 women who received 17OHPC and 40 who received placebo in a multicenter randomized trial of 17OHPC to prevent recurrent preterm delivery. Results: Both low and high baseline saliva P and E3 were associated with a slightly increased risk of preterm birth. However, 17OHPC prevented preterm birth comparably, regardless of baseline salivary hormone concentrations. 17OHPC did not alter the trajectory of salivary P over pregnancy, but it significantly blunted the rise in salivary E3 as well as the rise in the E3/P ratio. Conclusion: 17OHPC flattened the trajectory of E3 in the second half of pregnancy, suggesting that the drug influences the fetoplacental unit.
Original language | English (US) |
---|---|
Pages (from-to) | 506.e1-506.e7 |
Journal | American Journal of Obstetrics and Gynecology |
Volume | 199 |
Issue number | 5 |
DOIs | |
State | Published - Nov 2008 |
Keywords
- 17-alpha-hydroxyprogesterone caproate
- longitudinal studies
- preterm birth
- salivary estriol
- salivary progesterone
ASJC Scopus subject areas
- Obstetrics and Gynecology