The impact of maternal body mass on the effectiveness of 17 alpha-hydroxyprogesterone caproate.
OBJECTIVE
To examine the impact of maternal prepregnancy body mass index (BMI) on rates of recurrent preterm delivery (PTD) in women receiving 17alpha-hydroxyprogesterone caproate (17P) prophylaxis.


METHODS
The study population was identified from a large perinatal database containing prospectively collected information from women at high risk for PTD. We included patients with a current singleton pregnancy and a history of PTD who received weekly nursing visits and 17P 250 mg intramuscular injections beginning at 16.0 to 20.9 weeks' gestation. The data were stratified by number of prior PTDs (1 or >1) and maternal prepregnancy BMI (lean, normal, overweight and obese). Primary study outcomes included the rates of recurrent PTD at <35 and 32 weeks' gestation, and pregnancy loss at <24 weeks' gestation.


RESULTS
Delivery outcomes for 606 women receiving 17P were analyzed. There were no significant differences found in the incidence of preterm labor, the rates of recurrent PTD or pregnancy loss at <35, 32 or 24 weeks between the BMI groups.


CONCLUSIONS
Maternal prepregnancy BMI does not appear to influence the rates of recurrent PTD in women with singleton gestation receiving 17P prophylaxis. Larger studies are needed to confirm our findings.
Department of Obstetrics and Gynecology, Wright State University, Dayton, Ohio 45409, USA. gary.ventolini@wright.edu
Gary
G
Ventolini
Janice
J
Duke
William
W
Po
Sheela
S
Barhan
Debbie
D
Rhea
Cheryl
C
Desch
Niki
N
Istwan
Gary
G
Stanziano
D000077713:17 alpha-Hydroxyprogesterone Caproate; D000328:Adult; D015992:Body Mass Index; D005260:Female; D006801:Humans; D006908:Hydroxyprogesterones / Q000627:therapeutic use*; D011247:Pregnancy; D047928:Premature Birth / Q000517:prevention & control*; D011446:Prospective Studies; D055502:Secondary Prevention; D015149:Tocolytic Agents / Q000627:therapeutic use*; D055815:Young Adult
D006908:Hydroxyprogesterones; D015149:Tocolytic Agents; D000077713:17 alpha-Hydroxyprogesterone Caproate