How do I determine the Confidence Intervals for my parameters using MATLAB?

I have a 9 ODE model with 9 different parameters that is called function SteppingModel2. I have a second script which consists of a function to define my initial parameter values. In a third script, I have my objective function and in a fourth script I minimize the objective function using fmincon to estimate my parameters. Is there a way to determine the confidence intervals of my parameters while I am estimating using fmincon? I am using least squares.

I would not say I am the most experienced with MATLAB, so if you could simplify your explanations that would be helpful.

Thanks!