Canine Reproduction ABDUL SAMIK DEPARTEMENT OF VETERINARY REPRODUCTION

Slides:



Advertisements
Similar presentations
Human Reproductive System
Advertisements

TEKNOLOGI REPRODUKSI dan INSEMINASI BUATAN PET ANIMAL
Unit Basic principles of agriculture/horticulture science:
Understanding Animal Reproduction
Unit C Basic principles of agriculture/horticulture science:
Reproduction in the Dog
Natural Animal Reproduction
Reproduction and Development of the Human Reproductive Systems
Female Reproductive System Jr/Sr Veterinary Science
39-3 The Reproductive System
Matt McMillan, Ph.D.. Includes: Vulva Vagina Cervix Uterus Oviducts Ovaries.
Reproduction in the Cat. Feline Physiology and Reproduction Reproduction in the Queen 10 months (range 4-18). Average age of puberty in the queen:10.
Colorado Agriscience Curriculum Animal Science Unit 4 – Reproduction and Genetics Lesson 4 - Female Hormones of Reproduction and Estrous.
Reproduction in the Cat
Reproduction in the Canine and Feline
The Reproductive System of a Mare
Endocrine Glands and Hormones that are Associated with Male Reproductive System and Their Function. Following endocrine glands and hormones are associated.
Anatomy of Reproduction
Reproduction.
Asexual Reproduction in a Sea Anemone. Overview: Doubling Up for Sexual Reproduction The two earthworms in this picture are mating Each worm produces.
The process of meiotic cell division in a human male usually forms
Feline Reproduction Sexual maturity between 6* and 9 months of age Seasonally polyestrous - induced ovulators Ovulation induced by copulation Gestation.
Chapter 13: Reproduction Chapter overview: –Chapter 13 presents the anatomy and physiology of reproduction, including: anatomical views and parts identification.
Animal Reproduction The process by which offspring are reproduced.
Animal Reproduction Terms
Female Reproductive System.
1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CHAPTER 17 REPRODUCTIVE SYSTEM.
Human Reproductive System. Male Reproductive System.
The Reproductive System
Swine Reproduction. Breeding herds Replacement gilts Replacement gilts Sows Sows Boars Boars.
Figure 46.0 Frogs mating Chap46 Animal Reproduction.
FRIENDSHIP “Friendship is like peeing on yourself: Everyone can see it, but only you get the warm feeling that it brings.”
Human Reproductive System. Bellwork – 5/4/15 Define Hypothalamus: Portion of the brain that connects the endocrine and nervous systems, and controls the.
Reproduction Animals for breeding should be excellent representatives of their breed Decision to breed should not be made without a specific goal in mind.
Vaginal Cytology Evaluation
Reproductive System Cont. Female Anatomy & Physiology Chapter 28.
AA22 Animal Science II Animal Anatomy & Physiology
While some individual aspects of reproductive physiology in the cat are shared with other domestic species, when combined, they set the cat apart as somewhat.
Hormonal Control of Pregnancy and Lactation. Dr. M. Alzaharna (2014) Early Embryonic Development After fertilization, the embryo spends the first four.
The HUMAN BODY Chapters 34 and 35 Reproductive and Immune Systems.
Feline Reproduction ABDUL SAMIK DEPARTEMENT OF VETREINARY REPRODUCTION
Female Reproduction Ms. Geistweidt Equine Science.
1 Department of Veterinary Reproduction Faculty of Veterinary Medicine Airlangga University 2009 PHYSIOLOGY OF REPRODUCTION REPRODUCTIVE CYCLES Part II.
Reproduction in the Canine and Feline Animal Sciences 434 John J. Parrish.
The Effect of Hormones on the Estrous Cycle
Reproduction in the Canine and Feline
Reproductive. Male Anatomy Function-produces sperm (male gamete) Testes- Produce sperm Enclosed by scrotum Located outside of body-(2º C cooler) Muscles.
Anatomy of Reproduction of the Mare
Small Animal Reproduction. What is reproduction? Sexual Reproduction is the union of egg and sperm to produce a new animal Two parents required  male.
Importance of Reproduction
Animal Reproduction Animal Science. Functions of the Male System.
Female Reproductive Hormone Cycles. The Human Female Reproductive System The ovaries are where meiosis occurs and where the secondary oocyte forms prior.
The Human Reproductive System The gonads-testes and ovaries-are endocrine glands that secrete sex hormones. However, the primary function of the gonads.
By C. Kohn, Waterford, WI. Tissue only responds to a hormone if it has a receptor for that particular hormone works sort of like a lock and key a hormone.
The Female Reproductive System Chapter 48. The Ovaries Produce both the egg cells and sex hormones Made primarily of connective tissue and held in place.
Animal Reproduction The Reproductive Process in Mammals.
The Reproductive System
The Reproductive System KIN 312. Anatomy of the Male.
Cattle Reproduction.
Reproductive System Female Anatomy and Hormones
PROFESSIONALISM “No man ever reached to excellence in any one art or profession without having passed through the slow and painful process of study and.
Reproduction In Dogs.
Reproduction in the Canine and Feline
Reproduction in the Canine and Feline
Reproduction in the Canine and Feline
Anatomy and Physiology Overview
Reproductive System Female Anatomy and Hormones
Presentation transcript:

Canine Reproduction ABDUL SAMIK DEPARTEMENT OF VETERINARY REPRODUCTION FACULTY OF VETERINATY MEDICINE UNAIR

Endocrine Glands of the Dog http://upload.wikimedia.org/wikibooks/en/9/95/Anatomy_and_physiology_of_animals_Main_endocrine_organs_of_the_body.jpg

http://www.goddardvetgroup.co.uk/images/anatomy_physiology_6.jpg

Bulbis glandis (dog only) http://www.vivo.colostate.edu/hbooks/pathphys/reprod/semeneval/dogcoll3.jpg Bulbis glandis (dog only) Responsible for the tie or coital lock Penile spines (tom only) Responsible for inducing ovulation Dependent on testosterone production http://www.vetmed.lsu.edu/eiltslotus/theriogenology-5361/cat%20penis%20spines.jpg Find penile spines picture

Dog reproduction Estrus length 7-13 days Ovulation type Spontaneous Breeding 10-16 days from start of estrus Gestation 60-66 days Litter size 4-12 Litters / year 2 Weaning 7-8 weeks

Reproduction Estrus every 6-8 months Estrus lasts 21-22 days Ovulation about 10th day Pseudopregnancy common

Canine Estrous Cycle Stage Duration in days External signs Proestrus 4-14 (9 days) Enlarged Vulva w/ bloody discharge, restlessness, no courtship w/ male Estrus 4-21 (10 days) Clear to pink vulva discharge, female turns hindquarters towards him, raises pelvic region, waves tail, male acceptance and courtship Diestrus 60 Vulva shrinks, no discharge, non-acceptance of male, terminates with parturation Anestrus 100 + Inactive ovaries, no vulva discharge, low steroids

Ovarian Cycle is Divided into Four Stages A. Pro-estrus Physical turgid swelling of vulva and appearance of a bloody discharge. Vaginal cytology will change with very early non-cornified epithelial cells increasing towards end of proestrus. Behavior - bitch is restless and secretes pheromones but is aggressively negative towards male becoming more passive towards start of estrus B. Estrus Vulva swelling will soften and discharge will be slightly pink to straw- colored. Some females will still have a bloody discharge in estrus which is normal. Vaginal cytology will have a high concentration of cornified epithelial cells with little debris. Behavior - bitch seeks male turns hindquarters towards him, raises pelvic region, waves tail to one side and finally stands for mating by male.

C. Metestrus D. Anestrus Pseudopregnancy Loss of vulva swelling and no discharge. Vaginal cytology is no cornified cells and high numbers of White Blood Cells. Behavior - non-acceptance of male D. Anestrus Period of ovarian inactivity and no vaginal discharge Will not return to heat again until at least 4 months Pseudopregnancy Extension of metestrus period in which progesterone concentrations remain elevated. Female will have nest building behavior and enlarged mammary glands.

Provides sexual posturing Changes During Estrus of Bitch Vulva Swollen and Enlarged Bloody discharge from vulva Copulation Aggressive towards Male Passive Provides sexual posturing to male for copulation Proestrus Estrus -8 -4 0 +4 +8 +12 Indicates Day of Peak in LH

Follicular Development http://openlearn.open.ac.uk/file.php/1638/SK220_1_017i.jpg

Ovulation: Ova are released from the follicles approximately two to three days following initiation of LH surge. Fertilization: Ovulated ova are not ready for fertilization (must complete Meiosis I) and therefore are not fertilized until Day 4 to 7 following the LH surge.

LH Peak The greatest number of ovulations occur 24 to 72 hours after the LH peak. Breeding can be timed from the LH Peak to the fertile period 4 to 7 days later. Plasma Progesterone (P4) Plasma P4 concentrations rise prior to ovulation - follicles will start luteinization before ovulation Measurement of serum P4 can be used as a means to determine day of ovulation and breeding - can be highly variable

Hormonal Patterns During Estrous Cycle of Bitch Fertile Period Ovulation Fertilization Estrogen Completion of Meiosis I Arbitrary Plasma Concentrations Progesterone LH -10 -6 -4 -2 0 2 4 8 12 14 Days from LH Peak

Control of Estrus in the Bitch A. Androgens Mibolerone Mode of Action: Administration: B. Progestins Ovaban (UpJohn) - Methytestosterone Negative feedback on FSH and LH Initiate 30 days prior to expected onset Proestrus (Schering) - Megestrol Acetate - Negative feedback on FSH and LH Depends upon stage of estrous cycle. Lower dosage needed if given 7 days prior to proestrus. A much larger dosage is needed to block ovulation if given during proestrus.

Induction of Estrus GnRH Administration: Estrus induction can be used to treat bitches that fail to cycle or have silent heats. Response of fertile estrus is highly variable. Anestrus is the result of low FSH and LH. GnRH can be used to successfully induce estrus in the bitch. However, it requires frequent (every 90 min) administration over 10 to 11 days. Specialized infusion pumps (mini-pumps) can be utilized to deliver the pulses of GnRH GnRH analogs can be used to induce fertile estrus in the bitch without giving frequent injections.

Intromission by vigorous thrusting of the hindquarters. Breeding Intromission by vigorous thrusting of the hindquarters. Swelling of bulbus glandis swells (6X4 cm) in the vagina Vulva sphincter muscles contract around the penis forming the copulatory “tie”. First Stage of Coitus The “Turn” Second Stage of Coitus

Hormone Concentrations During Pregnancy and Parturition Mating Prolactin Progesterone Corticosteroids Arbitrary Plasma Concentrations Total Estrogens 0 10 20 30 40 50 60 70 Days of Pregnancy

Pregnancy Diagnosis A. Abdominal Palpation B. Radiography C. Ultrasonography Day 25-32 Day 42 Day 21

Signs of Impending Parturition Behavior of bitch is one of nest building, restlessness and seeking quiet, out of sight areas. Vulva becomes swollen, edematous and may have some vaginal discharge. Relaxation of pelvic and abdominal muscles is a consistent sign of impending parturition. Presence of milk in mammary gland is not an accurate sign. Decrease in body temperature from 38 to 37oC just before parturition.

Parturition First Stage of Labor Averages 4 hours but can last 6-12 hours Period in which the cervix dilates Bitch will be uneasy, refuse food, pant, vomiting and frequently looking at flank. Second State of Labor Visible straining of bitch in the sitting position Placental membrane will break and there will be fluid discharge from vulva. Membrane will rupture spontaneously or through licking of dam. After the start of labor first fetus cannot be expected to survive more than 6 hours in the uterus. Fetuses should be delivered within 2 hours of each other. Usually interval between puppies is about 30 minutes.

Third Stage of Labor Passage of fetal membranes should take 5 to 15 minutes. Dystocia Definition: Any problem with delaying normal birth of fetus. Symptoms Abnormal fetal presentation, position or posture Strong and persistent labor for 20 minutes without delivery of fetus. Weak and infrequent contractions for 2 to 3 hours More than 4 hours from delivery of last fetus (if not last one) Most common problem is uterine inertia (weak contractions), size of fetus and birth canal.

Contraception in Bitch Surgical: Physical: Intravaginal Device Silastic and polyethylene tubing placed in vestibule and vagine. 50% of bitches can still tie and get pregnant. Adding copper ring increases effectiveness Hormonal: Progestogens : Medroxyprogesterone - MAP Megesterol Acetate – MGA Androgens : Implants – Mibolerone Immunological : Immunize against LH Anti-ZP3 - anti-zona vaccine Ovariectomy Hysterectomy Tubal Ligation

Contraception in Male Surgical : Chemical Agents : Immunization : Castration - Correct behavior such as wandering fighting, and urine marking Vasectomy - Tie Vas Deferens Chorhexidine - injected into epididymis Immunize against LH