Makena Injections

Mary • Married to a Marine with a beautiful 4 year old! Due in July with #2!
Who has been on Makena injections? Did they work for you and why were you on them? Did you have side effects?
Trying to see how they worked for other people in other situations. My doctor wants me on them from 16 weeks to 36 weeks (he said "hoping you make it that long"). He said it will slightly increase my chances of having a full term baby instead of another preemie but only a little because of why I'm high risk...