Vitamin A and copper.
D003300:Copper / Q000097:blood / Q000378:metabolism*; D004194:Disease / Q000378:metabolism; D005260:Female; D006801:Humans; D008099:Liver / Q000378:metabolism; D008297:Male; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D012737:Sex Factors; D014801:Vitamin A / Q000097:blood / Q000378:metabolism*
D014801:Vitamin A; D003300:Copper