Vaccinate 30 to 60 days before she is due . All female llamas should be vaccinated with Clostridium types C and D and Tetanus 30 to 60 days prior to giving birth. It is essential to boosting the protective antibodies in the colostrum for the cria. Giving the vaccine closer than 2 weeks prior to birth does not give the vaccine time to produce an antibody response in the female and allow her to put those antibodies in the colostrum. Giving the vaccine too far before birth loses out on the maximum antibody levels and does not give you the most benefit for the time and expense of giving the vaccine.
Prostaglandins are one of the agents released by the body with inflammation.
Certain types of prostaglandins in the correct amounts could damage the corpus luteum which produces progesterone and cause an abortion. This difference between the vaccines is all theory and has not been scientifically proven though. Continue to deworm on your regular schedule . Deworming with drugs approved by your veterinarian for pregnant animals does not pose any risk to the pregnancy. Pregnant animals are not exempt from parasite control.