Coconut oil is a multi functional product which is safe for internal and external use during pregnancy.
The rich oil is commonly used in the prevention of stretch marks and to maintain the elasticity of the skin. It is usually only the use of certain essential oils (aromatherapy) which is not recommended during pregnancy as they may initiate labour or be dangerous for the baby.
If you are using the Flannerys Own brand of coconut oil I would suggest the use of the Organic Extra Virgin variety as it has not undergone any refinement and therefore it has not been exposed to any chemicals in its production.