it's almost 12 years completed for our marriage. I didn't become mother yet. when I will conceive

Vanishree, you need to have enough confidence. It's still have chance for you to have a healthy baby. Be relax and wait patiently. During the preparation time, your husband and you need to have a healthy life and enough rest. In the spare time, you can take more exercises. All these will do good things for your baby.