Age should not be more than 40 years
The Surrogate mother's age should not be more than 40 years. Moreover her BMI should also be in check.
Health History should be cleaned
If the woman is not a first time surrogate, then cases of her previous deliveries must be checked. And, the doctor should determine if the surrogate is in a state to carry the baby safe in her womb.
She must be willing: After finding the surrogate, make sure that she is willing to for the procedure.
Ask the surrogate if she could give the baby to be born the same love and care as the biological mother gives