In ___ (not yet born)

UTERO

["Think of the Latin term for the place where a fetus develops before birth, often mentioned in medical contexts."]

The clue "In ___ (not yet born)" hints at a Latin phrase meaning "in the womb." "In utero" literally translates to "inside the uterus," which is where an unborn child develops. The blank fills with "utero" because it’s the standard term for this prenatal state, often used in medical or biological contexts. The clue plays on the common phrase while keeping it straightforward.