Related by context. Frequent words. (Click for all words.) 69 sperm 64 spermatozoa 59 oocytes 57 gametes 57 ovum 56 oocyte 53 ovaries 53 embryos 52 ovary 52 ova 52 Embryos 51 fertilized eggs 51 embryo 51 semen 51 amniotic fluid 51 germ cells 50 follicles 49 reproductive organs 49 Sperm 49 wombs 49 ejaculate 48 uterus 48 testes 48 reproductive tract 47 infertile 47 breastmilk 47 babies 47 offspring 47 secretions 47 blastocysts 47 fallopian tube 46 fallopian tubes 46 placental 46 fertilized embryos 46 fetus 46 IVF treatment 46 blastocyst 46 eggs 46 IVF cycles 46 ovulate 46 semen samples 46 infertile couples 45 offsprings 45 IVF 45 mouse embryos 45 female fetuses 45 ovulation 45 uterine wall 45 testis 45 colostrum 45 donor sperm 45 ovarian tissue 45 hair follicles 44 newborn infants 44 cervix 44 undergoing IVF 44 fetuses 44 cloned embryo 44 kidneys 44 placentas 44 womb 44 thyroid hormones 44 placenta 44 fetal tissue 44 stem cells 44 Rh 44 female hormone estrogen 44 menses 43 semen sample 43 endometrium 43 menstrual blood 43 breast milk 43 umbilical cords 43 tissues 43 prostate tissue 43 blood platelets 43 somatic cells 43 vitro fertilization IVF 43 livers 43 mycobacteria 43 organs 43 hermaphrodites 43 diseased cells 42 diseased tissue 42 HSCs 42 copulate 42 aneuploidy 42 uterine lining 42 hepatocytes 42 unborn babies 42 insemination 42 urethra 42 ectopic pregnancies 42 yeast cells 42 bone marrow stem cells 42 oxygenated blood 42 fertilized egg 42 prolactin 42 iPS cell 42 genetic defects 42 X chromosome