According to a new study of emotional suffering on the success of IVF or other techniques of assisted reproduction.
The report seeks to dispel the myth, that the restriction prevents, that women who become pregnant.
Cardiff University researchers reviewed 14 previous studies, the 3 583 women.
The report examines previous studies on the effectiveness of the therapy of AHR research.
Women had their level of tension in which 14 trials before the treatment begin, and is a then supported reproductive therapy to undergo a single cycle.
Stress levels were based on recognized psychological techniques and the characteristics as anxiety, tension and depression.
Researchers looked in each study women highlighted prior to their treatment were all are more or less likely to become pregnant.
The results showed that stress had no bearing on the question whether a woman is pregnant.
Professor Jacky Bolvin, principal investigator of the University of Cardiff, told BBC that he is a "common myth", which would affect women who have highlighted the effectiveness of fertility treatment.
She said: "there are to many myths as people is pregnant."
"Women with fertility treatments, the already often pregnant themselves blame for himself to stressed out and more, they are not pregnant more stressed they get." This reinforced the myth only. »
However, she felt, it was important that women ignored not the stress, they felt: "Fertility treatment are stress, in and of itself." Women are not allowed except eight leave feeling stressed - because this could mean that they no further treatment. »
About a third of the couples end supports reproduction treatments at an early stage due to the stress involved treatment.
Clare Lewis-Jones, Chief Executive of the charity network in the United Kingdom said infertility, BBC, that the report is encouraging, but it is important, not the restrictions are ignored.
"During exertion the success of the treatment does not affect, not the need for patients who ignore to get support and understanding."
"Hospitals should ensure that all efforts to care for the patients not only on the best treatment but also their emotional and practical support must.".
The results of this study are reported in the British medical journal.