Quote:
Originally Posted by
~Caitlyn~ 
Oh, mama - was just referencing the prostaglandins because there is an increased rate of uterine rupture (main concern of vbac) when they are involved. They should not be used on a scarred uterus, but I totally understand your reasoning. I would just think that it is another proof of strength for your uterus that it has withstood augmented labor.
The contraindications are for prostaglandins at term to induce labor.
The protocol for using prostaglandins earlier is different. I was given misoprostol for missed miscarriage after a CS even though you actually need a much bigger dosage in early pregnancy (800mcg for missed abortion, vs 25mcg for cervical ripening at term). I don't know when the cutoff is, but the guidelines are very different (I once saw a chart for dosage at various gestations). (As an aside, it is also OK to give misoprostol for PPH if necessary, even if you've had previous surgery.) Despite having had misoprostol that time (twice in fact) this was never a factor in whether or not to VBAC for my second.
Like MeepyCat says, the pressure on the scar earlier in pregnancy is very different. While I am not saying you're a bad candidate for VBAC based on the info you've given, I don't think these losses will "count" in a VBAC sense. Previous vaginal births count not only because they "prove" the scar, but the pelvis. (Apologies for my quote overuse.)
I think your doctors' concern is due to you having had 3 previous sections; the current ACOG guidelines call for VBAC as an option after 1 or 2 sections, but not more. One study in the UK did have positive results, but the numbers were small, and given the number of potential VBA3Cs, it's unlikely we'll ever have really solid data on the risks unless we aggregated them for years if not longer.
I'm sorry for your losses.
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