As you have said, you have lot of facial hair and increased body weight, these symptoms more of suggest polycystic ovarian Syndrome
This is a hormonal
imbalance which leads to irregular ovulation/anovulation
and irregular cycle and so difficulty in conceiving.
Sometimes, the ovaries become resistant to the medications and the eggs dont grow even with the medications. So, your doctor has increased the dose of the drug this time.
Now serial follicular study
can only help us to know whether the eggs are growing and big enough(mature) for Ovulation to occur and to perform IUI.
Alongwith, all these you need to reduce weight by diet and regular exercise.
Hope this information is helpful.Good Luck.
Dr. Mrs. Sumeet Baheti