Yes. Overweight issues can obstruct success of infertility treatments. But then this can be managed with timely diet management combined by physical activities for healthy weight loss. Increased weight proves to affect the birth rate among obese women. You can consult your dietitian and infertility specialist for an effective solution.
Overweight caused lot of problems for me as well. I was not able to conceive for 2 years. Lastly, I reduced my weight after one doctor mentioned that baby's birth can also be negatively impacted if the overall weight of the mother's body is more than the BMI. Overall, it is possible for an overweight woman to conceive but then the consequences of the excess weight in the body pose to be severe for most of the women. My infertility specialist asked to modify my diet as well to achieve the best possible results.