hog:0000200 chorionhog:0000464 first polar bodyhog:0000465 second polar bodyhog:0000616 extraembryonic mesodermhog:0000720 zona pellucida - vitelline membranehog:0000721 amnionhog:0000767 extraembryonic cavitieshog:0000830 yolk sachog:0000979 trophectodermBFO:0000050 part of
hog:0000671