Reproductive immunology

Tests such as NK cell testing and treatments such as intralipids or steroids are offered by some clinics, but good evidence of benefit is lacking and some carry risks. The HFEA reviews the evidence for add-ons and publishes a rating for each; see the HFEA add-ons page for the current rating, as evidence can change.

Also known as: immunology testing, NK cells, natural killer cells, immune tests

Last reviewed: 23 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.