Aw mama, low hemoglobin sa 20 weeks ay common talaga especially if you're not supplementing well or your iron intake is hirap, a few of us moms experienced that din at nag-panic kami haha. Definitely bring this up sa OB mo sa next visit para ma-check properly and ma-adjust ang iron supplement if needed, kasi importante talaga ang oxygen flow to baby. Marami rin sa group namin na nag-improve agad after consistent iron intake and eating more iron-rich foods like red meat at leafy greens, so don't worry too much okay? Alam mo ba if it's just borderline low or really concerning?