Complex sentence: If infants are exposed to sign language, regardless of whether they themselves are deaf or hearing, they will babble with their hands at approximately the same time vocal babbling appears, although sign production appears a few months before word production generally does in hearing children.
Split into simpler sentences: If infants are exposed to sign language, regardless of whether they themselves are deaf or hearing, they will babble with their hands at approximately the same time vocal babbling appears. Sign production appears a few months before word production generally does in hearing children.