ANS 3006C Lecture Notes - Lecture 17: Corpus Luteum, Artificial Insemination, Estrous Cycle
12 Oct 2016
School
Department
Course
Professor
Document Summary
Follicular cyst: causes nymphomania, short estrous cycles, to fix the issue: Luteal cysts: failure to regress the corpus luteum leads to anestrous, to fix the issue: Primordial germ cells: these cells migrate to the embryonic gonads, once at the gonads, they are then called gonocytes, gonocytes develop into either: Spermatogonia: at puberty spermatogonia undergo mitosis and meiosis to form spermatozoa. Factors that affect selection: genotype, phenotype, environment, breeding season. How long does it last: mating systems. Swine: standing still when pressure on the rump. Cattle: (cid:862)ridi(cid:374)g(cid:863) or sta(cid:374)di(cid:374)g to (cid:271)e (cid:373)ou(cid:374)ted (cid:271)(cid:455) a(cid:374)other fe(cid:373)ale. Horses: tail lifting, winking vulva, excessive urination. Determining when to breed: use devices such as: Heat from other animal mounting turns the patch a different color. When all females express estrus at the same time. Manipulating the estrous cycle: administration of reproductive hormones. Gnrh to induce follicle turn over and ovulation. Normal presentation for delivery: cow, ewe, and mare.
