For the patient, the main complication that may occur is ovarian hyperstimulation. Its origins are still unknown: it is sporadic and often light, with symptoms such as abdominal dilation , nausea and swelling of the ovaries. The operating risks linked to the retrieval of eggs are rare and small and the risks linked to sedation and anaesthesia are extremely limited.
For the foetus, some studies show a higher rate of miscarriage in pregnancies owing to assisted reproduction. This is often due to the age of the patient or her existing conditions. The more embryos transferred to the womb, in order to increase the chances of conception, the greater the risk of a multiple pregnancy. For this reason, ProCrea transfers a maximum of two embryos per cycle.
Fears remain that children born by means of assisted reproduction are at greater risk for malformations, owing to the chromosomal alteration that can be caused by the manipulation of gametes, which could give rise to an imperfect foetus. This risk is minimal, as certified by numerous scientific data.