Vasectomy reversal

My husband had a vr a week ago. The dr said it was the best he had seen after 16 years and it only looked like it was 5 years old. He told my dh he had 97% live healthy sperm on both sides with tails and heads. Does this mean we have a 97% chance of becoming pregnant or ..... im 38 he is 45 we both have children from previous marriages but non together. I didnt even think the surgery would work since the v was so old. Now I am trying not to get excited ( too late) since im not too far into this journey and dont understand a whole lot of it. (Yet) what do you all think, should I not get my hopes up?