Columbia subject headings:
Fetus--Anatomy--Early works to 1800.
Fetus--Physiology--Early works to 1800.
Perinatology--Early works to 1800.
Harvard subject headings:
Fetus--Anatomy--Early works to 1800.
Fetus--Physiology--Early works to 1800.
Perinatology--Early works to 1800.
Princeton subject headings: