Of course. If they didn't, they would require that every pregnant woman be on bed rest for 9 months.
So being on bed rest for the whole pregnancy is safer than doing normal activities? Going to need a source for this?
ETA: It seems bed rest for healthy pregnant individuals is the worst thing you can do. But then again what would expect from pro-lifers?
Understand the side effects
Bed rest during pregnancy can pose health risks, including:
A blood clot in a deep vein, such as a vein in your leg (venous thromboembolism)
Decreased bone mass (bone demineralization)
Musculoskeletal and cardiovascular deconditioning
Stress due to self-blame, child care issues, and concerns about job loss or finances