Asides from medical care available at your destination, you need to consider the dangers of a long flight. When my wife, who is a physician, was pregnant she passed on a long trip to Australia from the US West Coast because it was too long to be in a plane and seated. Check with your wife's OB for a recommendation.
HI, all. Experienced diver and somewhat experienced UW photographer, here. From Sonoma County, California. Just upgraded from my old Oly EPM-! in an Oly housing, to an OM-D EM10, Mark IV in a Backscatter Octo housing. Still using my trusty S&S YS-D! strobes. Looking forward to learning from everyone else's experience and knowledge.