In a study done in Human Reproduction in 2011, this question was answered to a meta analysis, is aspirin effective in women undergoing in vitro fertilisation? Aspirin has often been given to women undergoing IVF with the hope that it improves blood flow of the endometrium and allows the embryo to implant.
In the study ten studies were looked at in which aspirin was given and it confirmed that it did not improve blood flow in IVF patients and it did not improve pregnancy rates. There is some evidence that aspirin prevented the occurrence of preeclampsia during pregnancy, though the evidence is small. It is concluded that aspirin does not improve pregnancy rates in IVF and its routine prescription in IVF cycles is not good.