Hydroxyprogesterone
"I had spontaneous premature labor with my first pregnancy, and delivered my son at 30 weeks 1 day after a two days of attempts to stop my labor. I received the makena injection beginning at 19 weeks during my second pregnancy, and received my last shot at 35 weeks 5 days, I believe. I had my daughter 8 days later at 36 weeks 6 days, so almost what is considered full term. I'm currently pregnant with my third, and began the injections at 19 weeks again this time. I'm 35 weeks now, and as of last week my cervix was still high and closed. I've not had any side effects from the shots other than injection site reactions a few times, such as some itching, swelling, and a lump/knot. My overall experience has been good, definitely worth it!"