Doing heavy weightlifting, holding your breath while lifting, or lying on your back during pregnancy doesn't harm your baby or your pelvic floor health.

Lying on your back and holding your breath while lifting weights during pregnancy won't harm your baby, according to this claim.

Some pregnant women did strength training during the middle and later parts of their pregnancy, and nothing bad happened — so it might be safe, but we don't know for sure yet.

Working out with weights while pregnant doesn't harm the mom or the baby — it's safe.

When pregnant women who regularly work out lift light to moderate weights (up to 50 lbs), their baby’s blood flow doesn’t drop—it actually goes up a little bit during the lift, which means it’s probably safe for them to do these exercises without worrying about cutting off the baby’s blood supply.

When pregnant women do strength training, it's usually part of a mix of exercises, but most studies don't clearly say how hard, how often, or how much weight to use — so we can't figure out the best way to make moms healthier.