Anti lua antibody test

Hii mommies, I am 17+4 weeks pregnant. I have anti lua test pending whicb was supposed to test earlier bt they couldn’t do it for some reason and they have scheduled it now on my 28th week. I wanted to know the effect of this test on me and my baby if it comes positive or negative. My midwife couldn’t answered this properly. Plz help me with this. Anyone having the same issue? Plz do answer. TIA