Medical biologists are researching a fertility disorder that prevents developing offspring from forming the structures they need to maintain nourishment and continue development. therefore, development ceases early during gestation. what is the final stage of development that these offspring could reach before development stops?

zygote
blastocyst
fetus
gametes

The correct answer would be blastocyst.

A blastocyst is a developmental stage in which blastula develops into a blastocyst. The blastocyst has a specific cavity termed as blastocoele and a mass of cell termed as inner cell mass.

The cells of inner cell mass differentiate to form the three layers of an embryo which then give rise to different tissues and organs.

Thus, the blastocyst is the last stage on which medical biologists should research on.

i believe the answer is snake.