If a human fertilized egg/fetus had the same legal rights as a person, should employing a pregnant woman be illegal?

In the US, it’s legal for young children to work for their parents unless the work is hazardous to them. It’s illegal to force a person of any age to work. It’s illegal to discriminate against pregnant women for the purpose of protecting fetuses. However, if a fertilized egg/fetus is deemed to be a person with legal rights, should it be illegal for a pregnant woman to work either because it is deemed hazardous or constitutes forced labor? What if the pregnant women is a single working mother of an existing child? Should the US Congress be required to address related laws if it seeks to overturn current law regarding abortion? (Please Note: This question isn’t about whether abortion itself is the “right” or “wrong” thing to do. Instead, it’s about how a country that governs itself based on a system of laws balances the rights and protection of all it’s citizens.)