How they are expressed

Success rates are expressed as:

  • Positive pregnancy tests (biochemical pregnancies)
  • Clinical pregnancies (embryos with heart beat)
  • On going pregnancies (>12 weeks)
  • Live births
either per embryo transfer or per treatment cycle.

The presentation of results can also be based on special parameters, like:

  • Age of woman, e.g. pregnancy success rates for women below 40 and over 40, or for women <35, 35-40, 40-43, >43 years of age.
  • The treatment method: in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI) transfer of cryopreserved embryos (FER), preimplantation genetic diagnosis (PGD, PGS), oocyte or embryo donation (OD, ED), in vitro maturation oocytes (IVM), etc.
  • Cause of infertility, etc.