first of all congratulations for delivering a beautiful baby. i have gone through your medical history in detail. diastasis of 2. 5 cm is considered a moderate degree of diastasis as far as our classification is considered. diastasis is usually hard to heal up completely only with physiotherapy. since the defect is bony it takes lots of aggressive manouvers to get the bones back together. initial three to four weeks after delivery are the most important days if you want to get back the diastasis to normal with physiotherapy. if you have an immediate post-delivery x-ray then you can get a new x-ray done and compare the diastasis gap in both x-rays to see the progress. if it is still the same even today then there are very fewer chances that this may improve only with physiotherapy. you can use gradually compressing pelvic belt which can be tightened gradually day by day. if even this does not help then you may need surgery to get the diastasis normal. try and post an x-ray of the pelvis here so that i can guide you better. for further information consult a physiotherapist online --> <link>
can physiotherapy heal diastasis recti?