Related by context. Frequent words. (Click for all words.) 65 artificially inseminated 63 inseminated 60 insemination 60 artificial insemination 58 impregnate 54 conceive naturally 48 semen sample 48 ovulate 47 Lun Lun 46 donor sperm 45 matings 45 vasectomy 45 conceive 45 Mei Xiang 45 anesthetize 44 tranquilize 44 miscarry 44 procreate 44 hormone injections 43 IVF treatment 43 copulate 43 sterilize 43 marry 43 abort 43 fertility 43 castrate 42 euthanize 42 vitro fertilization 42 fertilized eggs 42 domesticate 42 breastfeed 42 semen 42 cloned embryo 41 sperm 41 cloned embryos 41 embryos implanted 41 crossbreed 41 circumcise 41 impregnated 41 giant panda cub 41 prevent unwanted pregnancies 40 terminate pregnancy 40 medicate 40 genetically engineer 40 IVF 40 undergoing IVF 40 captive bred 40 infertile 40 vitro fertilization IVF 40 cloned 40 monogamous 40 fertility treatments 39 marriage annulled 39 mating 39 exhume 39 contraceptive 39 captive breeding 39 IVF cycles 39 surrogate mother 39 ordain 39 suckle 39 zoo keepers 39 breeding 39 ovulating 38 marmosets 38 turkey baster 38 infertility treatments 38 pelvic exam 38 marmoset 38 Tian Tian 38 offspring 38 zookeepers 38 zoologists 38 sperm donation 38 evict 38 lactating 38 impregnation 38 veterinarians 38 ovarian tissue 38 reattach 38 fertilize 38 estrus 38 hermaphrodites 38 crossbreeding 37 circumcisions 37 Embryology Authority HFEA 37 tissue samples 37 castrated 37 fertilized embryos 37 vasectomies 37 castration 37 impregnating 37 replacement heifers 37 tubal ligation 37 embryos 37 panda cub 37 pregnant 37 sperm donor 37 IVF treatments 37 birthing 37 cloning