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

Egg aging and its consequences

Aging of human eggs starts after 30 years old. It results in the increase of amount of eggs with spontaneously occurred mistakes in the chromosome number.

The percentage of abnormal eggs and embryos grows with the age of a woman. If we look into the pool of eggs collected in one egg collection there will be around 20-25% of abnormal eggs in the age of 30, 40-45% of abnormal eggs in the age of 35 and 70-75% of abnormal eggs in the age of 40. The percentage of abnormal eggs grows dramatically after the age of 40 so that it is hardly possible to find normal eggs in the age above 43 [D. Wells, 2013]. As a result 1 in 4 morphologically good blastocysts is aneuploid in the age of 30, and 3 in 4 morphologically good blastocysts are aneuploid in the age of 41. [Ata, Munne al 2012 – 875 cycles, 4600 embryos]

Conclusion: The percentage of abnormal embryos increases with the age of an egg.

Hence a reliable method is required to sort aneuploid embryos out before embryo transfer. This method is called PGS – pre-implantation genetic screening. Contemporary PGS techniques allow testing for all 46 chromes.

“…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…”



“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…”


"...If I would have known at the start, what I know now, I would not have done my IVF-attempts at my age as egg donation gave us result straight away. It was the best decision of our lives!"

Karin and Pedro, Sweden

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)
    Dagens Nyheter, Sweden. 7 May 2019
    Russian baby guarantee is the Swedes’ last chance
    Svenska Dagbladet, Sweden. 7 April 2019
    Mum through embryo donation
    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
    "I became pregnant with an embryo adoption”
    One more story about our dear patient Cilla Holm by Tara Magazine, Sweden
    Titiyo became this year's Comeback Mum: "I've broken the norm"
    Monika and André pay 240,000 SEK for having a child
    "Had to travel abroad to get pregnant after 8 IVF attempts in Norway"
    Interview with our patient Elin Renate by TV2 Norway
    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