My mother had this. In her final pregnancy, my brother was born at 36 weeks, after spontaneous rupture of the membranes and was delivered very quickly weighing 4lbs 4ozs. (She had been scheduled for an induction on Monday but he was born on the Saturday before).

If you have placental insufficiency, the problem doesn't right itself unfortunately. Can you ring the doctor who gave you the diagnosis and perhaps see if they will give you some more information? It might help put your mind at rest.

BTW my brother, although very small and undernourished at birth, did very well and is now 30 years old.

Best of luck Caddie.