Un articol lamuritor, cu cifre clare: nu FIV-ul in sine creste riscul de cancer ovarian, ci conditiile medicale (in principal endometrioza) care au facut necesara apelarea la FIV.Why IVF’s link to ovarian cancer isn’t as simple as the headlines suggest
Figures for the disease are higher for women who have had the treatment but that’s because of fertility problems are a sign of underlying factors
Recently there were newspaper reports linking IVF to a higher risk of ovarian cancer . And yes, it’s true, the cancer figures from women who had undergone IVF did display this tendency.
Reading these reports must have been pretty scary for women who’d had IVF or were contemplating it. They shouldn’t have been.
Researchers at University College London studied the records of more than 255,000 women who’d had IVF since 1991. Within nine years of treatment, 386 were diagnosed with ovarian cancer.
The usual rate of ovarian cancer is about one in 75 women over her lifetime. The new figures raise this to one in 55 for women who have had IVF .
However, the rate for ovarian cancer is one in 46 among women who undergo IVF because of problems with their fertility. It’s one in 32 for women with endometriosis, a common and painful condition where cells from the uterus migrate to other parts of the body. These women seem to be particularly vulnerable.
Change of focus: We need to look at the women who seek IVF rather than the treatment itself
So the headlines were misleading. It’s not IVF itself that raises the risk of ovarian cancer, it’s the reasons behind a woman needing IVF that are linked to ovarian cancer. To be precise, those prone to the condition are women who resort to IVF before their 30s because of fertility problems and women with endometriosis.
This condition is linked to a 135% increase in the risk of developing the cancer, while infertility per se carries a 62% greater risk.
What’s happening here is that IVF is simply flagging up fertility problems related to a greater risk of ovarian cancer – IVF does not cause the disease.
Adam Balen, professor of reproductive medicine at the University of Leeds and chairman of the British Fertility Society, throws further light on this picture.
Prof Balen says that if IVF is needed due to a problem with the man, the risk of ovarian cancer isn’t increased.
He adds: “Women who have IVF along with certain conditions, such as endometriosis, may be at increased risk of developing ovarian cancer.”
It isn’t related to the number of IVF cycles either. Professor Balen theorised that women who ovulated more might find that the cells in their ovaries had to work harder to repair themselves, increasing the risk of the copying errors that can lead to cancer.
And he sensibly shifted our focus from IVF itself to the women who seek IVF. He suggested women with endometriosis and fertility difficulties should be regularly screened for ovarian cancer which has been made easier with a promising new blood test.Sursa.