Hi mama! Honestly, better safe than sorry, I'd check with your OB muna kasi the chemicals and fumes from polygel, plus prolonged sitting position, might not be ideal when you're 6 months along na. A few of my mum friends had their nails done throughout pregnancy pero they made sure the salon was super well-ventilated and they didn't stay too long, pero marami rin na nag-skip entirely para walang risk sa baby. If you really want something, ask your doctor kung okay lang with your specific pregnancy, at least you'll have peace of mind, diba?