Mare's Reproductive Cycle

15 Points Per Correct Answer - No time limit  

1. During winter when a mare is not cycling, she is in ___________. Dioestrus None of these Oestrus Anoestrus

2. The main hormone that makes a mare show she is in season is ________. Progesterone Follicle Stimulating Hormone Testosterone Oestrogen/estrogen

3. The period between seasons is called _________. Dioestrus Oestrus Anoestrus None of these

4. A mare is stimulated to begin cycling in spring when the ________ at the base of the brain senses increasing daylight. Tectum Hypothalamus Thalamus Septum

5. When follicles in the mare's ovaries reach at least 2cm, the anterior P_______ gland secretes luteinizing hormone, causing follicles to erupt and release the ovum within. Answer: (One Word)

6. Once ruptured, the follicle forms an active corpus luteum and becomes responsible for secretion of __________. Progesterone Both of these Oestrogen/estrogen Neither of these

7. __________ from the ______ ______ keeps the uterine horns in a receptive state so that if sperm fertilises the egg, the embryo will have a suitable home to grow and develop. Oestrogen, Corpus Luteum Progesterone, Corpus Luteum Progesterone, Luteinizing Hormone Oestrogen, Luteinizing Hormone

8. After approximately 14 days, if there is no embryo, the uterus will release _________. Oestrogen Prostaglandin Progesterone Follicle Stimulating Hormone

9. The uterus takes over the production of hormones approximately ___days into pregnancy. 150 200 50 250

10. The main hormone that makes a mare show she is in dioestrus is _______. Oestrogen Prostoglandin Follicle Stimulating Hormone Progesterone