Some IVF clinics copy our services, texts, presentations and arrange seminars in the same locations. Please be attentive to which seminar you register and which clinic you land in. Dr. Olga Zaytseff and her team runs own clinic O.L.G.A. in St. Petersburg and does not work for any other clinics. Lectures at our seminars are personally done by Dr. Olga Zaytseff

PGS benefit

4 randomized controlled trials have recently shown that PGS  for 23 chromosome pairs increases implantation rates at least by 1/3.

PGD for 23 chromosome pairs increases implantation rates at least by 1/3.

Randomized controlled trials Patient group Fresh or freezing Implantation rate after PGD for 23 chromosome pairs vs control
Yang et al. 2012 <35 day 5 biopsy, day 6 fresh transfer 40% increase
Schoolcraft et al. 2012 >35 (av 39) day 5 biopsy, freezing, FET 32% increase
Forman et al. 2013 >35 day 5 biopsy, day 6 fresh transfer 32% increase
Scott et al. 2013 20-42 (av. 32) day 5 biopsy, day 6 fresh transfer 28% increase


For example :

Schoolcraft et al. 2012 have shown in women above 35 year old (mean age 39) implantation rates is 56,7% after PGS for 23 chromosome pairs and only 38% implantation rates in controls after frozen embryo transfer. Miscarriage rates in control group were 17% and 0% after PGS.

The same results were shown in 2013 by Forman et al in the same patient group (women in the age 35 or older: 58,3% implantation rates in PGS group and 39,8% implantation rates in control group.

In summary the benefit of PGS for 23 chromosome pairs is:

  • Helps to choose the right embryo for transfer to the uterus not only on the basis of “good looks” but also with the knowledge of correct chromosome set
  • Increases pregnancy and live birth rates per embryo transfer
  • Reduces time to pregnancy via excluding chromosomally abnormal good looking embryos from usage
  • Helps to avoid unnecessary embryo transfers
  • Helps to avoid freezing of chromosomally abnormal embryos
  • Reduces miscarriage rates
  • Reduces the Down syndrome risk
  • Explains multiple unsuccessful IVFs (RIF)
  • Eliminates negative effect of maternal age on implantation

“…I am a single woman and when one is lonely, one is very sensitive…You saw me as a person and I felt that you can help me…”



After 3 IVF in Sweden, 3 miscarriages, Elisabet and Pär became parents of lovely Ester through egg donation in St. Petersburg

“Three times I went to Russia to pick up some eggs. Six embryos tested by PGS and one was good ))) This little embryo was born when I was 44 and the egg they used was from me when I was 43…”


Having questions? Ask our doctors now!

A blog by Tone Bråten

A blog — to help you on your journey to become parents!

Our patients tell their stories

    The Egg Solution
    Aftenposten, 27 September 2019, Norway. Miriam Lund Knapstad, Helle Aarnes
    Olga is the miracle doctor who gives baby guarantee, Sweden. 6 August 2019. Text & Malin Aunsbjerg
    Cilla Holm became a mother on her own – this is her new Liv (life)
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    Marie Granmar is my very dear patient from more than 8 years ago. Please listen to Marie’s interview on TV4 7 March 2019 in Sweden
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    Report on us on Norwegian Television TV 2
    Enjoy our dear patient Cilla's story, who has been interviewed by the "Dagens Nyheter", daily newspaper in Sweden
    Report on us and our dear patient Hillevi on SVTPlay & SVTNews