sleep

Tests such as amniocentesis and ultrasonography can determine whether a fetus is developing normally in the womb.

testosterone

Lew S. Katoff has written:

'A listing of infant tests' -- subject(s): Child development, Testing, Intelligence tests, Indexes

No.

There are no tests available that can be done physically to determine dyslexia at any age.

All tests that determine dyslexia require an evaluation of speech development along with mental development as indicated by oral or written questions.

There are some pre-literacy indications but they also are not physical.