The rise of these births may be linked to increased use of drugs to start or speed up labor and more births by Cesarean section.

VOA: special.2009.10.26

But a section of the country's labor code states that women should not do "hard,physical" labor that entails harmful or dangerous conditions.

VOA: standard.2009.11.05

Access to a Caesarean section to relieve the pressure of obstructed labor is the most common way of preventing an unborn child from pressing so tightly in the birth canal that it cuts off blood flow to surrounding tissue.

VOA: standard.2009.12.23

Many women who have had cesarean sections inquire about the possibility of attempting a vaginal birth after C-section (VBAC), sometimes also called trial of labor after C-section (TOLAC).

CNN: Is it OK to have a VBAC?

This risk carries over to future pregnancies, which is why any woman who has this surgery during her pregnancy will need to deliver her next babies by cesarean section before labor starts.

CNN: Study: Major benefits for spina bifida surgery in the womb

The change to Section 203 of the Labor Management Reporting Disclosure Act was first proposed in the waning days of the Clinton administration and then shelved by the incoming Bush administration.

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