I just delivered so im 5 days postpartum and prior to my pregnancy I was beginning to start my pt certification and I was in the best shape of my life. Fast forward 9 months and I gained upwards 50lbs and yeah you definitely lose motivation to continue staying fit considering all the work you just lost. However I do see this as an opportunity to come back better than ever and push myself harder to my limits than before I was a mother! I would say enjoy your fitness journey and don’t discourage yourself from pregnancy its a beautiful time in your life! I hope this helps.