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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Where a fetus develops 4 letters:

WOMB: Where a fetus develops
REUNITE: Like a developing fetus' location
BUNINTHEOVEN: Developing fetus, slangily
UTERI: Fetuses develop in them
EMBRYO: It develops into a fetus