Ewe Ram
Mare Stallion Cow
Proper Age for Period of Number of Females
First Mating Fertility (yrs.) for One Male 90 lbs. or 1 yr. 6
12–14 mos., 7 50–752 / 35–403 well matured
33 yrs. 3 yrs.
15–18 mos. 6
Period of Gestation (days)
AVERAGE RANGE
147 / 1511
142–154
10–12
12–15
10–14
336
310–370
40–454 / Record 2525
283
279–2907 262–3008
504 / Thousands5
Bull 1 yr., well matured 10–12
Sow 5–6 mos. or 250 lbs. 6 115 110–120
Boar 250–300 lbs. 6 502 / 35–403
Doe goat 10 mos. or 85–90 lbs. 6 150 145–155
Buck goat Well matured 5 30
Bitch 16–18 mos. 8 63 58–67
Male dog 12–16 mos. 8 8–10
Queen cat 12 mos. 6 63 60–68
Tom cat 12 mos. 6 6–8
Doe rabbit 6 mos. 5–6 31 30–32
Buck rabbit 6 mos. 5–6 30
1For fine wool breeds. 2Hand-mated. 3Pasture. 4Natural. 5Artificial. 6Holstein and beef: 750 lbs.; Jersey: 500 lbs. 7Beef;
8–10 days shorter for Angus. 8Dairy.
Incubation Period of Poultry (days)
Chicken .................. 21
Duck. . . . . . . . . . . . . . . . . . 26–32
Goose. . . . . . . . . . . . . . . . . 30–34
Guinea. . . . . . . . . . . . . . . . 26–28
Maximum Life Span of Animals in
Captivity (years)
Cat (domestic) . . . . . . . . . . . . 34
Chicken (domestic) . . . . . . . . 25
Dog(domestic)............ 29
Duck (domestic). . . . . . . . . . . 23
Goat (domestic) . . . . . . . . . . . 20
Goose (domestic) . . . . . . . . . . 20
Horse.................... 62
Rabbit................... 18+
Mare
Estral/Estrous Cycle (including heat period)
AVERAGE RANGE 21 days 10–37 days
Length of Estrus (heat) AVERAGE RANGE 5–6 days 2–11 days
When Cycle
Recurs If Not Bred
21 days
Sow
21 days
18–24 days
2–3 days
1–5 days
21 days
Ewe
161⁄ 2 days 14–19 days
30 hours
24–32 hours
161⁄ 2 days
Goat Cow
21 days 21 days
18–24 days 18–24 days
2–3 days 18 hours
1–4 days
10–24 hours
21 days 21 days
Bitch
24 days
16–30 days
77 days
5–9 days
Pseudo-pregnancy
Cat
15–21 days
3–4 days, if mated
9–10 days, in absence of male
Usual Time of
Ovulation
24–48 hours before
end of estrus
30–36 hours after
start of estrus
12–24 hours before
end of estrus
Near end of estrus
10–12 hours after
end of estrus
1–3 days after
first acceptance
24–56 hours after
coitus
References:
Archives