[Grammar] gapping in parallel structure that-clause

[Yonsu99]

A handful of scientists are picking apart infants' utterances and finding that not only is there an ordered sequence of vocal stages between birth and the first words, but in hearing-impaired babies a type of babbling thought to signal an emerging capacity for speech is delayed and distorted. Babies Sound Off: the power of babble

I think there's a gap in not only~but(also) structure in that-clause, and the gap is 'there is' since it appeared in an inverted form after "not only"

So to check the clause once more, can the following that-clause be separated into below two sentence?

that not only is there an ordered sequence of vocal stages between birth and the first words, but in hearing-impaired babies a type of babbling thought to signal an emerging capacity for speech is delayed and distorted.

>There is an ordered sequence of vocal stages between birth and the first words. And in hearing-impaired babies, there is a type of babbling thought to signal an emerging too.

 

[bhaisahab]

"And in hearing-impaired babies, there is a type of babbling thought to signal an emerging too." This makes no sense.

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[Barb_D]

This is not a good candidate for a "not only/but also" sentence I think. There is not enough of a contrast between the two statements.

 

[Yonsu99]

"And in hearing-impaired babies, there is a type of babbling thought to signal an emerging too." This makes no sense.

Then, could you possibly phrase the clause "but in hearing-impaired babies a type of babbling thought to signal an emerging capacity for speech is delayed and distorted." into a sentence so that it makes sense?

This is not a good candidate for a "not only/but also" sentence I think. There is not enough of a contrast between the two statements.

I think so, but I want to understand it.

 

[bhaisahab]

"A handful of scientists are picking apart infants' utterances and finding that there is an ordered sequence of vocal stages between birth and the first words, and in hearing-impaired babies there is a type of babbling thought to signal an emerging capacity for speech. However because of the hearing impairment, the speech is delayed and distorted."