nonhuman 50 rat 50 Female 42 Rats 42 article 40 animal experiment 39 female 38 priority journal 33 controlled study 30 Prolactin 27 Animal 23 prolactin 23 Animals 22 Male 21 animal cell 21 Support, Non-U.S. Gov't 19 luteinizing hormone 18 Rats, Sprague-Dawley 17 endocrine system 17 Luteinizing Hormone 16 male 16 animal tissue 15 follitropin 15 gonadorelin 14 hypothalamus 14 prolactin release 14 Rats, Inbred Strains 13 Animalia 12 Follicle Stimulating Hormone 12 Pituitary Gland, Anterior 11