Related by context. Frequent words. (Click for all words.) 65 ovulate 59 ovulation 58 estrus 57 menstrual cycle 57 menstruate 56 ovulating 55 inseminated 55 ovaries 55 reproductive tract 55 ejaculate 54 spermatozoa 53 menses 52 lactating 52 ovary 52 undergoing IVF 51 embryo 51 artificially inseminated 50 hormone injections 50 sperms 50 pregnancy 50 fertilization 50 ovum 50 progesterone 50 mating 49 menstruation 49 fertilized 49 uterine lining 49 fertility 49 vulva 49 IVF cycles 49 uterus 49 menstrual cycles 49 IVF treatment 49 oocytes 48 copulate 48 sperm 48 eggs hatch 48 neonate 48 pregnant mares 48 copulation 48 colostrum 48 coitus 48 reproductive organs 48 oocyte 48 infertile 48 zygote 47 blastocyst 47 females 47 ectopic 47 female hormone estrogen 47 mammary gland 47 offspring 47 ovarian 47 follicles 47 egg laying 47 copulating 47 X chromosomes 47 ejaculating 47 inseminate 46 excretes 46 lactation 46 uterine 46 mammary glands 46 ovaries removed 46 pupa 46 diploid 46 molting 46 hermaphrodites 46 teats 46 ovarian tissue 46 premenopausal 46 cloned embryo 46 hormone progesterone 46 molt 46 hormone 46 fertilized eggs 46 eggs 46 pregnant 46 germ cells 46 estradiol 45 pregnancies 45 semen 45 vaginally 45 hormonal 45 fallopian tube 45 menstruating 45 matings 45 Lun Lun 45 embryos 45 post menopausal 45 pupae 45 germline 45 menstrual 45 intercourse 45 fetus 45 impregnated 45 mouse embryos 45 weeks gestation 45 endometrial 45 ejaculated 45 artificial insemination