Yes it is safe...insurance companies advise therapist's not to spray clients who are in their first trimester as a precaution because it is the most risky stage of any pregnancy.
DHA (the tanning agent in spray-tans) is a natural substance and is only toxic if inhaled, in large quantities. Essentail oils can also be toxic but are also amazingly beneficial when used correctly.
Hope this helps.
Regards,
Tracey
http://www.thecurative.co.ukPs - I offer a selection of tans (Organic, Express, Light - Medium etc.) In the comfort of your own home; around the london area.