I also used Palmers cocoa butter cream and was fortunate to escape all stretchmarks! I used Bio oil AFTER preg on my c/s scar to help it fade and flatten and it's been doing a good job. My personal suggestion would be to use the Palmers stuff DURING preg - religiously (supposedly it has as much to do with the actual circulation to the skin/blood - so the rubbing action into the skin each day helps ) and then use Bio oil AFTERWARDS on any marks to help reduce them. It's better to play it safe