Progesterone is an important hormone that functions to maintain pregnancy and is produced by the corpus luteum. The aim of this study is to see a correlation between progesterone and incidence of embryonic death in aceh cattle. This study used four adult female cows, 3-5 years old, 150-250 kg body weight, clinically healthy and have a normal reproduction. The synchronized with prostaglandin F2 alfa hormone, with 5 ml doses, and double injection pattern with 11 day intervals. The blood were collected for progesterone measurements on day 5, 6, 7 post artificial insemination. Measurement of progesterone concentration was carried out using an enzymelinked-immunoassay (ELISA) and pregnancy with embryo mortality were performed using the transrectal ultrasonography method on the 25 day after insemination. The examination was repeated every 10 days until the 55 day after insemination. Progesterone secretion peaks in pregnant cows were on day 7 (2.082 ng/ml), in cattle LEM on day 5 (8,209 ng/ml) and in cattle not pregnant on day 7 (3,051 and 1,157 ng/ml). The pattern of LEM progesterone secretion on days 5 to 7 tends to decrease while those that survive tend to increase.