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Alpaca Gestation Calculator & Chart

Alpacas carry a cria for about 345 days (eleven and a half months), with most births between 335 and 355 days. Alpacas are induced ovulators — there is no heat cycle to watch — so breeders rely on behavior testing ("spit-offs") and ultrasound to confirm pregnancy. Crias overwhelmingly arrive in daylight, most often mid-morning.

Printable alpacas gestation chart (345-day average)

Print this and tack it by the breeding pen — or use the free HerdFlo app to get the exact date for any breeding, breed-adjusted, with calendar reminders.

BredCria due
Jan 1Dec 12
Jan 8Dec 19
Jan 15Dec 26
Jan 22Jan 2 *
Jan 31Jan 11 *
Feb 1Jan 12 *
Feb 8Jan 19 *
Feb 15Jan 26 *
Feb 22Feb 2 *
Feb 28Feb 8 *
Mar 1Feb 9 *
Mar 8Feb 16 *
Mar 15Feb 23 *
Mar 22Mar 2 *
Mar 31Mar 11 *
Apr 1Mar 12 *
Apr 8Mar 19 *
Apr 15Mar 26 *
Apr 22Apr 2 *
Apr 30Apr 10 *
May 1Apr 11 *
May 8Apr 18 *
May 15Apr 25 *
May 22May 2 *
May 31May 11 *
Jun 1May 12 *
Jun 8May 19 *
Jun 15May 26 *
Jun 22Jun 2 *
Jun 30Jun 10 *
Jul 1Jun 11 *
Jul 8Jun 18 *
Jul 15Jun 25 *
Jul 22Jul 2 *
Jul 31Jul 11 *
Aug 1Jul 12 *
Aug 8Jul 19 *
Aug 15Jul 26 *
Aug 22Aug 2 *
Aug 31Aug 11 *
Sep 1Aug 12 *
Sep 8Aug 19 *
Sep 15Aug 26 *
Sep 22Sep 2 *
Sep 30Sep 10 *
Oct 1Sep 11 *
Oct 8Sep 18 *
Oct 15Sep 25 *
Oct 22Oct 2 *
Oct 31Oct 11 *
Nov 1Oct 12 *
Nov 8Oct 19 *
Nov 15Oct 26 *
Nov 22Nov 2 *
Nov 30Nov 10 *
Dec 1Nov 11 *
Dec 8Nov 18 *
Dec 15Nov 25 *
Dec 22Dec 2 *
Dec 31Dec 11 *

* lands in the following calendar year. Table uses the 345-day average; individual animals vary (335–355 days).

Common questions

How long is an alpaca pregnant?

About 345 days — eleven and a half months — with a normal range of roughly 335 to 355 days. Some females run past 360 days without trouble.

What is a spit-off test?

A behavior test: a pregnant female will typically spit at and refuse an approaching male. Breeders test around 2 weeks after breeding and re-test periodically; ultrasound at 45–60 days gives certainty.

Why do alpacas give birth in the morning?

It is believed to be inherited from the Andes, where a cria born early in the day has time to dry and nurse before cold nights. Most crias arrive between mid-morning and early afternoon — night births are rare and worth a vet call.

Do alpacas have a breeding season?

Not strictly — as induced ovulators they can be bred year-round, though many North American breeders time births for mild weather.

Track the whole herd, not just one date

HerdFlo Pro adds animal records, breeding-to-calving tracking, weaning weights, and a treatment log with withdrawal dates. Join the launch list in the free app.

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