Columbia subject headings:
Fetus--Metabolism--Congresses.
Fetus--Nutrition--Congresses.
Miscarriage--Immunological aspects--Congresses.
Placenta--Congresses.
Harvard subject headings:
Fetus--Immunology--Congresses.
Fetus--Metabolism--Congresses.
Fetus--Nutrition--Congresses.
Maternally acquired immunity.
Miscarriage--Immunological aspects--Congresses.
Placenta--Congresses.
Princeton subject headings: