What do you do if the Birth Certificate does not have mother''s name, when I am are applying I-130 for my mother?

I am a naturalized US citizen. I am applying for I-130 (petition for alien relatives) for my mother. My original birth certificate which was issued from my old country does not have her name. In that society only father''s name was issued in childs birth certificate. Shall I go ahead and apply with what I have or shall I include any other documents at the time of my initial application