ANSC 320 Lecture Notes - Lecture 4: Defeminization, Semen, Spermatozoon
Document Summary
This is a process not a single event] Physiologically, the appropriate frequency and quantity of gnrh secretion for gonadotropin release from the anterior pituitary lobe: onset of puberty in female. Age at 1st estrus: becomes sexually receptive, exhibits 1st behavioral estrus, may not be accompanied by ovulation, silent ovulation, may not be true puberty. Age to support pregnancy w/o side effects: most applicable for producers, maximize production with shortest generation interval. Age at first ovulation: has to be determined via manual or visual validation, can be done through palpation or ultrasound, all of these require frequent observations. Is the best way to specifically identify puberty: may not always be practical, can be difficult to determine, onset of puberty in male. Age when behavioral traits begin: mounting and erection, generally occurs before spermatozoa production. Age at first ejaculation: nerve development, seminal fluid secretion, still generally occurs before spermatozoa production.
