Tanning while pregnant... Moms to be, your hormonal changes effect your skin and how it reacts to the sun and exposure to tanning beds. Pigmentation from exposure to UV rays is a real risk which will usually lighten significantly after you give birth or dissapear altogether. The best advice to tanning while pregnant is to keep yourself well hydrated and use a higher Sun protectionfactor (SPF) because your skin will be more sensitive to UVB rays...