Alere P17 shots; pre-term labor

Katlyn • I'm 23, was due June 3rd, 2016 with my second. He came 5/28/16 @ 1:36pm. I also have a 4 year old son 😍
My first child was born at 36 weeks 6 days, so 1 day shy of being considered a full term birth. I went to the doctors today and they discussed Alere to help prevent pre-term labor with this pregnancy, has anyone else taken this or is going to take it?