S.T.
Ask her about Crinone instead. This is something you use every day but you do it vaginally, instead of a shot it's a suppository. I have had preterm labor three times (first was at 28 weeks and the next two at 26 weeks.) So the fourth time around we did Crinone from 26 weeks and I was fine- no brethine or Mag praise the Lord! She was born at 37 weeks and I wasn't even in labor (I have c-sections.)
I would have a major problem with the shots, and was so glad she suggested this. It's expensive, but if you have insurance and your OB tells them it's necessary they should pay for it.
Feel free to email me ____@____.com
S., mom to four girls, three NICU babies fourth my first in my room!