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Scuba diving and pregnancy: can we determine safe limits?
M St Leger Dowse1, A Gunby, R Moncad
1Diving Diseases Research Centre, Hyperbaric Medical Centre, Plymouth, UK. marguerite@mstld.co.uk
Summary
Research on pregnant women divers found insufficient data to link scuba diving to fetal abnormalities. Pregnant divers are increasingly following industry recommendations to stop diving during pregnancy.
Area of Science:
- Physiology
- Maternal-fetal Medicine
Background:
- Limited human data exists on the effects of scuba diving on fetal development since 1989.
- Previous research has not established a clear link between diving during pregnancy and adverse fetal outcomes.
Purpose of the Study:
- To investigate the potential association between scuba diving during pregnancy and fetal abnormalities.
- To evaluate trends in diving behavior among pregnant women.
Main Methods:
- Combined data from a retrospective (1990/2) and a prospective (1996/2000) study.
- Analyzed 157 pregnancies across 129 women, encompassing 1,465 dives.
- Examined diving depth, gestational age at last dive, and cessation of diving during pregnancy.
Main Results:
- No significant correlation between diving and fetal abnormalities could be established due to insufficient dives per pregnancy.
- Over 90% of women in the later study ceased diving in the first trimester, an increase from the earlier study.
- A trend towards adherence to industry recommendations to avoid diving during pregnancy was observed.
Conclusions:
- Current field study methodologies are insufficient for establishing a causal link between scuba diving and fetal abnormalities.
- Animal research has limited applicability due to differences in placental circulation.
- It is unlikely that the effects of scuba diving on the unborn human fetus will be definitively established through current research approaches.
