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