[Sexual cycle].
D000818:Animals; D004971:Estrus; D005260:Female; D012739:Gonadal Steroid Hormones / Q000502:physiology; D008322:Mammals / Q000502:physiology; D010060:Ovulation; D010507:Periodicity; D011247:Pregnancy; D051381:Rats; D012098:Reproduction; D012621:Seasons; D014626:Vaginal Smears
D012739:Gonadal Steroid Hormones