Reproduction

Goat Reproduction: Breeding Season, Signs of Heat, Ovulation & Gestation

Q: How long is the heat cycle of a goat?

21 days in the MSD Veterinary Manual; N.C. Cooperative Extension says goats come into heat approximately every 18 to 22 days during the breeding season.

Q: How long is a goat in heat?

24–48 hours in the MSD Veterinary Manual; 12 to as long as 48 hours in N.C. Cooperative Extension.

Updated 1 Nov 20263 sources

Key reproductive figures for goats from the MSD Veterinary Manual ^[1]^[2] and from N.C. Cooperative Extension ^[3].

Key figures

Feature	Goat	Source
Age at puberty	5–7 months	^[1]
Cycle	Seasonally polyestrous, early autumn to late winter; 21 days	^[1]
Duration of estrus	24–48 h	^[1]
Best time to breed	Daily during estrus	^[1]
First estrus after kidding	Next autumn	^[1]
Gestation	150 days	^[2]

The MSD table also notes that many intersexes are born in hornless strains ^[1].

Signs of heat and breeding

Does in heat become vocal, and some bleat very loudly ^[3].
Ovulation usually occurs 12 to 36 hours from the onset of standing heat ^[3].
Does should not be bred until they reach 60 to 75% of their expected mature weight ^[3].
In the region the extension source describes, the breeding season generally extends from September to February ^[3].

How the sources compare

Feature	MSD Veterinary Manual ^[1]	N.C. Cooperative Extension ^[3]
Age at puberty	5–7 months	7 to 10 months
Estrous cycle	21 days	Approximately every 18 to 22 days during the breeding season
Duration of estrus	24–48 h	12 to as long as 48 h

Frequently asked questions

How long is the heat cycle of a goat?

21 days in the MSD Veterinary Manual ^[1]; N.C. Cooperative Extension says goats come into heat approximately every 18 to 22 days during the breeding season ^[3].

How long is a goat in heat?

24–48 hours in the MSD Veterinary Manual ^[1]; 12 to as long as 48 hours in N.C. Cooperative Extension ^[3].

How long is a goat pregnant?

About 150 days ^[2].

Related tools and references

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References

Features of the Reproductive Cycle (table)MSD Veterinary Manual
Approximate Gestation Periods (table)MSD Veterinary Manual
Heat Detection and Breeding in GoatsN.C. Cooperative Extension · 2015

For veterinary professionals. Information supports — never replaces — clinical judgement; always check the current product label and local regulations.