LEARNER- Low dosE AspiRiN prEterm tRial (Angola)

The proposed project is a prospective, randomized controlled study to evaluate the effects of daily low dose aspirin in pregnant women with Sickle Cell Disease at the first trimester versus the second trimester of the gestation period. The study will include 450 female participants of all ages, in multiple maternity hospitals in Luanda, Angola, with an official diagnosis of Sickle Cell Disease and confirmed pregnancy. Patients who consent to take part in the study will be given 100 mg aspirin once daily either at the first trimester (6-13 weeks) or the second trimester (14-27 weeks) of the gestation period. Up to 450 participants will be randomly assigned in a 1:1 ratio to the two study treatment trimester groups (225 starting the low dose of aspirin at the first trimester and 225 starting the low dose of aspirin at the second trimester). In both treatment arms, daily use of low dose aspirin will be prescribed/administered until week 36 or time of delivery, whichever comes earlier. Study Duration: Each participant will be enrolled in the study for the duration of the pregnancy as follow: Screening Visit Randomized Treatment Period Follow Up Period (6 weeks postpartum)