It is common for fertility clinics to screen their patients with blood and/or urine tests prior to starting treatments, for problems such as:
Sexually transmitted infections
Genetic diseases such as Cystic Fibrosis, Tay Sachs or Sickle Cell
Immunity for vaccines
The exact tests may vary between clinics and from patient to patient but are generally similar to those done by Obstetricians at the first prenatal visit. Knowing this information in advance may help guide the decisions you and your doctor make about pregnancy.