Honestly, most of us mums use perfume throughout pregnancy naman, pero mas okay kung light lang or fragrance-free ang pinipili mo during the first trimester kasi extra sensitive ang body mo that time, a few of my mum friends switched to milder scents or body mists nalang to be safe. Best talaga to check with your OB about which perfumes are okay for you specifically, since bawat pregnancy is different, pero in general light fragrances shouldn't be a problem as long as you're not using it heavily or in super enclosed spaces.