I went for my 29 week ultrasound apt and the doctor told me my cervix has shortened since my 20 week ultrasound.  They are seeing me again at 31 weeks for another ultrasound to see how it is.  Does anyone have exepriece or advice? I have been reading this can lead to bed rest or preterm delivery?  Also my baby boy is frank breech and they said my fluid was borderline low.