Treacle The majority of advice I've seen highlights the need for Sun protection more than ever. On that basis, I'd say it's ok. The first step should of course be cover up but that applies to everyone.
Interestingly,I googled it and found an article from the Guardian which references it. It also quotes a list from the RCOG saying that we should minimise our use of shower gel,moisturiser and cosmetics.... I tend to only have more 'natural' stuff anyway (i love REN and Korres) but there is no.way I'm cutting down on moisturiser given how bad my eczema has become now I'm pregnant!
www.theguardian.com/science/blog/2013/jun/05/pregnant-women-worries-sunscreen