Alpaca Gestation Calculator

An alpaca dam carries a single cria for roughly 335 to 350 days, close to a full year. Enter the mating or exposure date above for a due window, then use the notes below to plan for a daytime birth. None of this replaces guidance from your veterinarian.

Alpaca gestation at a glance

Typical averages; individual dams vary, and first pregnancies can run a little longer.

• Average length: 345 days
• Typical range: 335 to 350 days
• Roughly: 11 to 12 months
• Cria per pregnancy: usually one
• Twins: very rare
• Ovulation: induced by mating
• Birthing time: usually daytime
• Cria stands: within 1 to 2 hours
• Female name: hembra or dam
• Male name: macho or sire
• Baby name: cria
• Weaning age: about 6 months

Signs a dam is close to birthing

Alpacas, like llamas, usually give birth during daylight hours, an evolved habit called unpacking.

• Restlessness
• Frequent dung pile visits
• Separating from herd
• Humming changes
• Udder fills
• Loosening around the tail
• Rolling
• Off feed
• Sitting and rising
• Vocalizing
• Water bag appears
• Front feet then nose

Frequently asked questions

How long are alpacas pregnant?

Alpaca gestation averages about 345 days and usually falls between 335 and 350 days, close to eleven and a half months. Length can vary with the individual, the season, and whether it is a first pregnancy, so treat the calculated date as the center of a window.

Do alpacas usually give birth during the day?

Yes. Alpacas almost always birth in the morning or early afternoon, an evolved habit that lets a cria dry off and gain strength before the cold of night. A dam still in early labor late in the day is worth watching closely and discussing with your vet if progress stalls.

How does induced ovulation affect breeding dates?

Alpacas are induced ovulators, meaning the act of mating triggers the release of an egg rather than a fixed cycle. That makes the mating date a reliable starting point for a due window, which is why the calculator counts forward from the exposure date you enter.

What should a newborn cria do in the first hours?

A healthy cria should be standing within one to two hours and nursing soon after to take in colostrum. Weigh the cria if you can and watch that it nurses and passes meconium. If it is not up and feeding within a few hours, call your veterinarian promptly.