We put ‘healthy’ in quotes for a reason—because what’s considered ‘healthy’ is so different for each person! And, depending on a myriad of other factors, you may not need to fall exactly within this range. However, a BMI between 18-32 is recommended because this is what is considered medically healthy for a surrogate undergoing IVF and other treatments along the journey. A BMI that falls under the range may be too low for a safe pregnancy and delivery. It may also point to underlying health conditions for the surrogate. A higher BMI can impact the effectiveness of the IVF treatment, how your body responds to the medication, and ovarian function in general. A higher BMI can also lead to pregnancy and birth complications, too, which is why this requirement is set–not only for surrogates but at all fertility clinics.  In short, the BMI range is all about ensuring the healthiest pregnancy possible.