Filmmaker Karan Johar posted a picture of a long post on Twitter on Monday morning in which he opened about the premature birth of his twins, Yash and Roohi. Karan revealed that his journey as a father wasn't very smooth and he felt the pain of his kids' well-being. "My children were born two months premature and worryingly underweight. Like any person in this situation and on the brink of fatherhood, my heart sank. Knowing that there were complications with my babies birth owing to how soon it was, I was terrified. All I wanted to do was hold them and protect them but they needed to be in the NICU. It was painful to see how tiny they were," Karan wrote. Here is the full post: My mother and I remain eternally grateful from the bottom of our hearts for all the love and care that were given to Roohi and Yash Johar. pic.twitter.com\/G18HsgTkXl \u2014 Karan Johar (@karanjohar) March 27, 2017 In his post, Karan also mentioned that this wouldn't have been possible without medicines and thanked the medical team for their help. "Thankfully, I had a great support system. Roohi and Yash were in the hands of the most competent and patient doctors. Something that had its roots in an ordeal soon turned into an experience that I will never forget," he added. The 44-year-old director who recently concluded the 5th season of his talk show, 'Koffee with Karan' added that he wants to help premature babies. "As someone with a voice, I want to reach out. Millions of preemies are born every year\u2026. bu babies are resilient. With the right kind of care, they stand just as good a chance of survival as anyone else. Having a premature baby is something that you don\u2019t expect to happen to you. The whole experience has ignited a passion in me to help premature babies to get the best chance they can\u2026 to help those in anguish who want the best chance of survival for their early born babies. If your baby is a preemie, don\u2019t be discouraged," he wrote. You may also want to watch: Thanking his legal team for making the surrogacy possible, Karan Johar said,"Through the months before the birth of my children Roohi and Yash\u2026my strong legal team gave me unconditional love, support and counselling. The medical and legal team are the spine and strength\u2026and my children and I will remain forever indebted. I remain eternally grateful to my legal team\u2026@mrunaleshmukh9 @devdesh @gauravradhika..for their advice\u2026strength and support."