Creatinine is a chemical waste molecule that is generated from muscle metabolism. Normal levels of creatinine in the blood are approximately 0.6 to 1.2 mg/dL in adult males and 0.5 to 1.1 mg/dL in adult females. A few ways by which you can reduce creatinine levels are: - Avoid excessive strain during exercises - Don't take any supplements with contain creatine - Reduce your protein intake - Eat more fiber such as fruits, vegetables, whole grains, legumes - Stay hydrated at all times, Aim to drink a minimum of 3 liters of water per day Considering your age of 40 getting pregnant at this age is very risky and comes with multiple problems.