Hi mama! Caltrate Advance is generally safe during pregnancy, marami sa amin ang nag-take nito dahil kailangan talaga ng calcium at vitamin D especially ngayon na 29 weeks ka na, pero since you want to be sure about side effects and kung okay lang talaga for your specific pregnancy, best to check with your OB para sa peace of mind. Nakita ko maraming preggy moms na nag-adjust ng dosage based sa what their doctor said, so definitely worth asking!