Here is a theory on guiding an entity into the physical realm:
The guardians/parents are responsible for assisting and guiding the arriving entity for as long as required. It is their duty to make the process as easy as possible for the arriving entity.
To bring about a different experience one should be on a level where you are able to communicate with entities on the spiritual plane. This will give you the ability to interact with the entity that will join you in the physical realm. Meditation is a good tool to guide you to achieve this ability.
Being able to communicate with the entity you’ll be able to understand their path. Understanding their path you’ll be able to guide them best to achive their purpose and potential. Knowledge will always improve your chances of greater success when in line with cosmic law.
Communication with the entity inside the foetus will make the pregnancy experience easier on all entities involved. Being able to know what is happening with the foetus will put the parents at much greater ease. The entity can be guided on the coming experiences and also be put it at greater ease thru all the coming experiences.
Guiding and supporting the entity thru the actual birth process will now be possible to a much greater extend. Again, communication being the biggest contributor.
Enhanced communication with the entity as a new born baby will also improve the experience for all entites involved. Any discomfort that the baby might experience can now be more clearly expressed and understood making the growth experience easier for all involved.
As you can see, the experience will be vastly improved for all when communication is possible thru all the stages.
Light, Life and Love of the God of my heart be with you all!