Awoman has one damaged fallopian tube. the damage completely blocks the opening of the tube at the ovary. how will this most likely affect her fertility?

her likelihood of conceiving will be reduced by at least 50%.
her eggs, if fertilized, will not implant properly.
her eggs will not mature inside the ovary.
her chances of conceiving twins will be doubled.

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?