Oo, talagang nagbabago ang kulay ng ihi when you take folic acid and prenatal vitamins, usually nagiging darker yellow or more concentrated kasi the vitamins are water-soluble, so your body absorbs what it needs and the rest comes out sa ihi. A few of us pregnant mums noticed din na mas malakas ang amoy sometimes, and that's totally normal! As long as you're drinking enough water (which you should be doing anyway), wag mag-alala, it just means the vitamins are doing their job, lalo na importante yan sa 8 weeks mo para sa baby's development.