The gestation biometrics of the alpaca (Vicugna pacos) are described. The abdominal diameter was determined monthly from 10 pregnant alpacas. In addition, uterus of 49 pregnant alpacas were collected from the Maranganí herd (Cusco, Peru) and classified by gestational age known as mating date (every 30 days from day 30 to 330 [± 15 days]). Gravid uteri were weighed and measured, allantoic and amniotic fluid was removed and measured, and fetal weight and length were determined. The results indicate a slight increase in abdominal diameter until the end of gestation, the fetus gradually increases its weight as gestation progresses, being greater from the sixth month onwards. The total length of the fetus increases from month nine. The amniotic fluid represents less than 18% of the volume of the allantoic fluid, both fluids have low volumes. An increase in fluids could be observed towards m...

The aim of this study was to describe the arterial supply of the uterine-fetoplacental complex in alpacas during gestation. In total, 26 female alpacas were used; of these, 5 non-pregnant females were used to describe the irrigation of the reproductive tract and the origins of its irrigation; and 21 pregnant females were distributed in subgroups of 7 and slaughtered when they reached the 1st, 2nd and 3rd third of gestation, respectively. The specimens were processed using the filling-corrosion technique. Observation of uterine irrigation in pregnant and non-gravid uteri shows that it originates from the abdominal aorta artery, from where the ovarian arteries emerge, which pass towards the ovaries and from where they continue through the cranial uterine arteries and enter the uterine horns where they anastomose with the lateral and ventral branches of the caudal uterine arteries that take...