The Ninth Month Story Downloaded off National Website
The Ninth Month Story Downloaded off National Website Author Unknown Modified by the GA Agriculture Education Curriculum July 2002
The Bovine Reproductive Tract
Uterine Horns Ovary Cervix Vagina
Importance of Heat Detection Cow stands to be mounted for another
Follicle Produced by FSH
Ovulation-Follicle About to Rupture
Heat Chart
Artificial Insemination Inseminate 12 hours after standing heat.
Fallopian Tube- Site of Fertilization
CL (Corpus Luteum) v. The CL takes the place of the follicle v. Produces the hormone progesterone
Fetus: 30 Days- 1 Month • 2/5”- pea sized • Head and limb buds recognizable • Placenta not attached
Fetus: 60 Days- 2 Months
Fetus: 60 Days – 2 Months cont. • 6 -7. 5 cm • 21/2 -3 in • Claw buds and small scrotum, recognizable palate, sternum closed, placenta attached, and lens sized cotyledons present
Fetus: 90 Days
Fetus: 90 Days- 3 Months • • 13 -17 cm 5 -61/2 in Rat size Fine hair on eyebrows Claws developed Yellow-colored epithelial Plaques present on amnion Horn pits present
Fetus: 120 Days • • • 12. 5 -18 cm 5 -7 in Small cat size Fine hair on eyebrow Claws develop Horn pits
Fetus: 150 Days • • 18 -23 cm 7 -9 in Large cat size Hair on eyebrow and lips
Fetus: 180 Days • 40 -60 cm (15 -24 in) • Hair on inside of the ear, around the horn pits tip of tail, & muzzle
Fetus: 210 Days • 55 -75 cm (22 -30 in) • Long hair on tip of tail • Hair on the metatarsal, metacarpal and phalangeal region
210 days
Fetus: 240 Days • 60 -85 cm ( 24 -34 in) • Fine short hair all over the body • Incisor teeth not erupted
Fetus: 270 Days • 70 -100 cm (28 -40 in) • Hair coat complete • Incisor teeth erupted
Gestation Period 280 Days
Pelvis
Normal Calf Position
Abnormal Calf Positions
First Sign of Birth v First sign of birth is indicated by the presence of a waterbag
First Sign of Calf v The first sign of the calf should be the hooves
Parturition
- Slides: 29