It was 25 weeks for son and 26 weeks for daughter when I was put to bed. Terbutaline for both and Procardia for the 2nd one as well. In the hospital for a week on Magnesium Sulfate - ewww. My son was born the day I stopped the meds, 36 weeks (natural childbirth), and my daughter decided to turn breech the night before I stopped so I had to stay on another week while they tried to turn her around - with no luck. Born at 37 weeks C-section.
Best to stay in bed the whole time, laying on your left side, stay hydrated and check out lots of books. Reading about everything you can on babies is what I did and boy was I glad. Now is the time to be reading and learning about vaccinations. Also, check into making sure you are taking lots of omega 3's, Vitamin D3 (very important), antioxidants (A,C,E) and magnesium. Stay away from seafood/sushi, flu shots, and eat as much organic as you can.
The AAP recommended schedule of shots for children is too many, too soon. Here are sites and books that I always recommend for people to start their research:
www.909shot.com
www.tacanow.org
www.generationrescue.com
Healing the New Childhood Epidemics: Autism, ADHD, Asthma, and Allergies: The Groundbreaking Program for the 4-A Disorders, by Dr. Kenneth Bock
The Vaccine Book, by Dr. Robert Sears
What Your Doctor May Not Tell You About Childhood Vaccinations, by Dr. Stephanie Cave
Evidence of Harm, by David Kirby