kate,
when i was week 22, my gynae gave me the option of taking the jab cos if delivered before 35 weeks, the bbs lungs not ready yet. as the plan for me to deliver was week 35. he gave me this reasoning, is supposing i come in at week 32 for preterm, it might be even too late to do the jabs cos it had to be in 2 doses 24 hours apart. most mothers who come in, didn't manage to tahan till the second dose before the bbs come out.
so he say week 28 give me the jabs. but when i went in preterm labour at week 27, they faster gave me the injections, and at the same time stop the contractions.