This device is manufactured outside of the U.S. and it is not approved for this use by the Food and Drug Administration. Availability of this device is therefore limited. The norgestomet ear implant is therefore widely available. As the treatments were both working through the same mechanisms, they appear to be having the same results for estrous synchronization of deer. We treated red deer hinds with half norgestomet ear implants for 14 days and with 150 I.U. of intramuscular PMSG at implant removal.
Fertility is similar in females treated with either method of estrous synchronization.
Our current recommendations are shown below in Table 1. Recommendations for estrous synchronization of Red, Sika and White-tailed deer. The red deer and sika deer do not normally produce twins or triplets when treated with PMSG doses recommended here. However, higher doses of PMSG have been found to lower pregnancy rates in these species. Currently there are at least two practical methods for the artificial insemination of farmed or captive deer populations.