What precaution should pregnant women take regarding diving?

Pregnant women should avoid diving due to potential risks to the fetus. During pregnancy, physiological changes occur that can affect both the mother and the developing fetus. These changes influence the way the body processes gases during a dive and may increase the risk of decompression sickness or other complications associated with pressure changes in water.

Moreover, while diving, the fetus is particularly vulnerable, especially in the early stages of pregnancy when organs are developing. There is also concern that exposure to elevated pressures and the potential effects of inert gas absorption could adversely affect fetal development. Therefore, the general consensus among dive medicine experts is that pregnant women should refrain from diving entirely to minimize these risks and protect both themselves and their unborn child.

The other options do not adequately address the specific concerns related to pregnancy and diving, highlighting that avoidance is the safest approach rather than trying to mitigate risks through shallow diving, experienced partners, or time limits.