Gestation Lengths

Cattle

Age at puberty:

Length of estrous cycle:

Duration of estrus:

Type of estrous cycle:

Length of gestation:

Time of ovulation:

Optimum time to breed:

Age at puberty: 9-24 mo

Length of estrous cycle: 21 (17-24)

Duration of estrus: 18 hr (6-24 hr)

Type of estrous cycle: Polyestrus

Length of gestation: 9.5 mo (279-290 d)

Time of ovulation: 30 hr after onset of estrus

Optimum time to breed: 12 hr after onset of estrus

Sheep

Age at puberty:

Length of estrous cycle:

Duration of estrus:

Type of estrous cycle:

Length of gestation:

Time of ovulation:

Optimum time to breed:

Age at puberty: 4-12

Length of estrous cycle: 17 (14-19)

Duration of estrus: 30 hr (24-48 hr)

Type of estrous cycle: Seasonally polyestrus (fall-winter)

Length of gestation: 5 mo (144-152 d)

Time of ovulation: 26 hr after onset of estrus

Optimum time to breed: 24 hr after estrus begins

Goat

Age at puberty:

Length of estrous cycle:

Duration of estrus:

Type of estrous cycle:

Length of gestation:

Time of ovulation:

Optimum time to breed:

Age at puberty: 4-8

Length of estrous cycle: 21 (12-24)

Duration of estrus: 39 hr (1-4 d)

Type of estrous cycle: Seasonally polyestrus (fall-winter)

Length of gestation: 5 mo (140-160 d)

Time of ovulation: 30 hr after onset of estrus

Optimum time to breed: 24 hr after estrus begins

Horse

Age at puberty:

Length of estrous cycle:

Duration of estrus:

Type of estrous cycle:

Length of gestation:

Time of ovulation:

Optimum time to breed:

Age at puberty: 10-24

Length of estrous cycle: 21 (15-26)

Duration of estrus: 7 d (1-9 d)

Type of estrous cycle: Seasonally polyestrus (spring)

Length of gestation: 11 mo (332-340 d)

Time of ovulation: highly variable

Optimum time to breed: 2nd-3rd day of estrus

Swine

Age at puberty:

Length of estrous cycle:

Duration of estrus:

Type of estrous cycle:

Length of gestation:

Time of ovulation:

Optimum time to breed:

Age at puberty: 4-8

Length of estrous cycle: 21 (18-24)

Duration of estrus: 50 hr (1-4 d)

Type of estrous cycle: Polyestrus

Length of gestation: 114 d (112-116 d)

Time of ovulation: 40 hr after onset of estrus

Optimum time to breed: 24 hr after estrus begins

Chicken

Age at puberty:

Length of estrous cycle:

Duration of estrus:

Type of estrous cycle:

Length of gestation:

Time of ovulation:

Optimum time to breed:

Age at puberty: 5-7

Length of estrous cycle: n/a

Duration of estrus: n/a

Type of estrous cycle: n/a

Length of gestation: 21 d

Time of ovulation: every 29 hr

Optimum time to breed: every 10 d

Turkey

Age at puberty:

Length of estrous cycle:

Duration of estrus:

Type of estrous cycle:

Length of gestation:

Time of ovulation:

Optimum time to breed:

Age at puberty: 5-7

Length of estrous cycle: n/a

Duration of estrus: n/a

Type of estrous cycle: n/a

Length of gestation: 28 d

Time of ovulation: every 29-35 hr

Optimum time to breed: every 30 d