What is an affirmation?

Merriam-Webster defines affirm as "to say that something is true in a confident way; to show a strong belief in or dedication to (something, such as an important idea."

Why are affirmations said aloud?

The vibration and energy with which words are spoken impact your environment and your situations.  Everything we say comes to pass.  Affirmations are us consciously being aware of saying that which you desire. 

Can the fertility affirmations help me conceive?

The words you speak are very powerful to assist you in producing what you desire.  Speaking affirmations begins to override the contrary trains of thought you have and if done consistently, can reroute your belief system to align with and manifest your dream.