Just spotted your query Bindu. The numbers on the scale won't show weight loss because your muscle mass and bone density would have increased with yoga. Both are very good things, but muscle weighs more than fat and dense bone is obviously heavier than frail, hollow bone -- so don't worry about the weighing scale. For real assessment, you must now start measuring yourself with a inch-tape: at the crucial spots, like thighs, calves, hips, lower waist, chest, upper arms -- this will give the right estimate. So, don't worry. I think if people are noticing some changes, you are on the right track. Another point: your body gets used to same moves. So, even in the same poses you are doing, you can bring about some change to make your work-out more effective. If you have mastered a pose, hold it for longer and longer, breathing well and smoothly. Another way, is to find variations for the same pose. For instance, if you are doing cobra (bhujangasana) you must move ahead for its advanced variation like urdhvamukha svanasana (upward facing dog) -- this way you will do more in less time. best of luck. Yoga helps long term, remember, because your hunger levels go down, so don't lose hope just now. And also, include a good set of pranayama -- this also helps well with weight control. Happy sadhana!