Freeze-Drying Technology: According to Dr. Lord Winston, an infertility therapist, the rate of birth after the use of frozen seeds is just one percent, while others report higher rates.
Lord Robert Winston was referring to a 10-year period of freezing of the ovary in the BBC Radio 4 program.
Lord Winston, a professor at Imperial College in London, warned that ‘this was a failing technology’ and that after being frozen the contents of these vesicles changed to one percent.
However, they gave this ratio in relation to the birth of children.
The Human Fertilization and Embryology Authority (HFEA), which regulates infertility treatment in the UK, reports one in every five cases in this regard, far better than one in 100
Why do These Figures Differ?
This is because both are measuring success achieved at various stages in the treatment of infertility.
The IVF process travels beyond the frozen ovary like this:
- A frozen egg is un-frozen.
- Those who survive this freezing process are fertilized with sperm.
- Successfully fertilized seeds become embryos
- One or two embryos that succeed in survival (maximum three in women over the age of 40) are then transferred to the uterus.
One percent of Lord Winston’s data was in regard to the ovaries that survive the freezing phase that later lead to pregnancy and the birth of a living baby. However, the 2016 data from the HFEA was given to him when he described the pregnancy rate in the House of Lords as 1.8%.
At the time Lord Winston asked this question, there were no statistics available for the year 2016, but when the 2015 data was reviewed, up to 2% of the non-frozen ovaries of knowledge changed in pregnancy. And 0.7% were born.
The conclusions that the NHFEA made were based on how many embryos reached the birth stage. Under this same method of measuring success, in 2017, patients undergoing IVF treatment with their own disease achieved 19% of cases.
There is Some Information Left in Both Ways
If you are thinking about getting your ovaries frozen, you might want to know how likely you are to get pregnant with IVF. But given the success rate of each ovary (which has very few) it is forgotten that several seeds are used in an IVF round.
NHS gynecologist Dr. Sara Martbins da Silva explains that ‘this way one would expect’ frustration ‘during treatment.
‘Not every ovary becomes embryo, not every embryo is infected with pregnancy, nor does every pregnancy produce a mucus.’
Seeds are wasted at every step, from non-frozen to fertile, to an embryo, and then to the uterus, and not all the seeds involved in the process are intended to be used.
But HFEA data only talk about the birth rate of cases where Embryo was transferred to the uterus, but not every case of treatment goes to Embryo. This means that the success rate of HFEA will be reduced if it includes the stages before embryo transfer.
When Lord Winston asked for data in 2016:
- 1204 Seeds are non-frozen, but it is unknown how many IVF rounds were done for them.
- Of these, 590 (49%) seeds were fertilized.
- 179 (30%) of these 590 patients were transferred.
- Of the transferred embryos, 22 changed in pregnancy, which is 13%.
- This year 6199 seeds were frozen and probably not frozen.
There are no recent statistics in this regard because the HFEA does not regularly publish statistics.
And this does not even indicate the success rate of women in individual affairs. This is an average number, but there are those women who have all their seeds frozen while others have not.
The chances of becoming pregnant depend on the age of the woman at the time the disease was frozen and what her general health was.
According to the HFEA, the rate of births during each procedure was higher than in those women whose age was less than 35 years at the time of freezing of the disease, while the rate decreased with age. That is, in a young and healthy woman the odds are higher than 19%.
Dr. Jara Benagi works at the Center for Reproductive Health, and her private clinic freezes women who do so for ‘social’ reasons, rather than medical reasons. The birth rate during the entire treatment at their clinic is 27%.
The HFEA also pointed out that very few women in the UK use their frozen seeds, so it is difficult to draw such a hard result with such a small sample.