If you're pregnant with twins, does working long hours increase your risk for preterm labor? is it recommended to stop working?

It depends: Twins predisposes you to a risk of preterm labor. We typically follow twins with cervical ultrasounds to measure the cervical length. The shorter the cervix, the greater the risk of ptl. If you have a short cx, then yes, we typically restrict a persons work. If the cervix is normal in length, then many women maintain their activity level.