Puig-Duran, E <br/><br/>
A critical period for positive feedback in immature (21-day-old) rats.  [electronic resource] 

 -  The Journal of endocrinology  Feb 1978 
 - 311-20 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-0795 
<br/><br/><label>Standard No.: </label>10.1677/joe.0.0760311  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aging<br/>Animals<br/>Castration<br/>Circadian Rhythm<br/>Estradiol--pharmacology<br/>Feedback<br/>Female<br/>Luteinizing Hormone--blood<br/>Male<br/>Progesterone--pharmacology<br/>Prolactin--blood<br/>Rats<br/>Sex Factors