Twenty Pasundan cows were used in this study to know the effect of synchronization using prostaglandins and hormone gonadotropins on the picture of erythrocytes, leukocytes, and pasundan cow hemoglobin levels during pregnancy. The Pasudan heifers experimented with estrus using a combination of prostaglandin hormone (PGF2α) as much as 5 ml per head and gonadotropin realising hormone (GnRH) as much as 2.5 ml per head intramuscular to homogenize fertility conditions and improve fertility. The estrus mother cow is immediately carried out artificial insemination as much as 2 times with an interval of 6 hours. All test cows were given forage basalt food and adlibitum drinking water. Pregnancy examination is carried out on the 60th day and the 150th day of post-insemination using the rectal palpation method. Changes observed in the form of hematological concentrations include erythrocytes, leukocytes, and hemoglobin. The results showed that the concentration erythrocytes, leucocyte, and hemoglobin for Garut region respectively was 6.24±0.61 (million/μl); 11.54±0.25 (thousand/(μl); 11.54±0.61 (g/dl) higher than Bogor in a row was 5.99 ± 0.64 (million/μl); 11.46± 1.41 (thousand/(μl); 11.13 ± 0.60 (g/dl)). The results of the variance analysis showed that the synchronization of estrus with prostaglandins (PGF2α) and the gonadotropin releasing hormones (GnRH) did not differ markedly (P>0.05), between the concentrations of erythrocytes, leucocytes, and hemoglobin during the gestation period with cows that were not pregnant. It concluded that the synchronization treatment of estrus with prostaglandins (PGF2α) and gonadotropin releasing hormones (GnRH) had no effect on the profile of hematological concentrations during the gestational period (60 days and 150 days) and was no different from Pasundan heifers that are not pregnant.

This study aims to determine the morphometric characteristics and reproductive performance of Pasundan cows which are extensively reared on smallholder farms in the coastal areas of the south (Garut, Cianjur, and Sukabumi) and North Priangan (Bogor, Purwakarta, and Sumedang). This research is descriptive research with a qualitative approach. Production characterization was carried out using a simple method, namely by measuring the body surface including shoulder height, chest circumference, body length, and bodyweight of Pasundan cattle. Meanwhile, the reproductive characteristics discuss puberty, service per conception (S / C), conception rate (CR), calving rate, postpartum estrus, postpartum mating, days open (DO), calving interval (CI), calving birth weight, and calving rate. calves weight growth. Data were collected by survey, the location was determined by purposive sampling in the area of the seed source with the largest population and the random sampling of livestock was determined purposively as many as 30 Pasundan cows from each region. Data were analyzed using quantitative descriptive analysis. The results showed that the morphometric characteristics of Pasundan cattle included mean shoulder height of 123.0 0 ± 3.06a cm VS 121.34 ± 2.82a in males and 110.34 ± 2.78 vs 108.00 ± 2.14a in females. Body length 115.74 ± 3.30 cm VS 115.34 ± 2.97acm in males and 112.67 ± 2.97cm VS 109.67 ± 1.82 cm in females. Chest circumference 145.67 ± 2.97cm VS 142.67 ± 2.67cm bulls and 136.00 ± 2.95cm VS 131.00 ± 2.92cm in females, Bodyweight 268.0 ± 17.00 kg VS 246.00 ± 7.00a for males and 215.0 ± 15.00 kg VS 194.00 ± 54.00kg in females. As for reproductive characteristics, it shows puberty of 20-24 months., S / C 1.4 - 1.6, Conception rate 65-70%, calving rate 62.5-65%, Postpartum Estrus 50-60 days, postpartum mating 72-104 days, day -open 94-126 days and a calving interval of 12-14 months. Calves' birth weight was 18.0 - 18.5 kg and daily body weight gain ranged from 0.48 to 0.50 kg. It was concluded that the morphometric characteristics and reproductive performance of Pasundan cattle in the Pesisir Selatan area were better than North Priangan.

Twenty Pasundan cows were used in this study in order to determine the concentration of the hormones estrogen, progesterone, and the level of pregnancy. The cows were randomly divided into two groups of 10 each. The first group was synchronized with a prostaglandin double injection (Lutalyse TM, Upjohn, Kalmozoo USA, containing 25 mg of Dinoprost Tromethamin) at a dose of 5 ml/head intramuscularly 2 (two) times with an interval of 11 days. The second group was injected with prostaglandins (PGF2α) at a dose of 5 ml/head intramuscularly 2 (two) times with an interval of 11 days, but on the 9th day they were injected with gonadotropin realizing hormone (Fertagyl, Intervet Animal Health UK Ltd, Cambridge; which contained 100 µg Gonadorelin which is synthetic GnRH)), Cows in heat are artificially inseminated twice with an interval of 6 hours. The variables observed were concentrations of estrogen and progesterone during estrus and 2 months of pregnancy, service preconception, and calving rate. The data were processed with analysis of variance and descriptive. The results showed that cows that were injected with PGF2 α + GnRH, had an average plasma concentration of the hormone progesterone 2.68 ± 0.19 ng/ml and 26.65 ± 2.09 pg/ml estrogen, service preconception 1.0, a calving rate 90% higher than those injected with α PGF2 including progesterone. 2.68 ± 0.19 ng / ml and estrogen 26.65 ± 2.09 pg / ml, service preconception 1.2 and calving rate 90%. The results of the analysis of variance showed that the plasma concentrations of progesterone and estrogen when the cows were 60 days pregnant when they were injected with the PGF2α + GnRH combination had a very significant effect (P <0.01) higher than the control (PGF2α). It was concluded that the progesterone, estrogen profile, pregnancy rate results from estrus synchronization using a combination of PGF2 α and HnRH higher than single PGF2α.

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Twenty Pasundan heifers were used in the study to find out calving rates related to the concentration of hormones and metabolites of the mother's blood during the farm. The experimental mother cow was given a combination of the hormone prostaglandin F2α as much as 5 ml per head and gonadotropin realising hormone (GnRH) of 2.5 ml per head intramuscular to uniformize fertility conditions and improve fertility. The mother cow is immediately carried out artificial insemination 2 times with an interval of 6 hours. All experimental cows were given forage basalt food and adlibitum drinking water. Pregnancy examination is carried out on the 60th and 150th days of post-insemination using the rectal palpation method. The observed variables in the form of calving rate were related to plasma concentrations of the hormones progesterone (P), estrogen (E), and blood metabolites levels β-OH butyric (BHBA), blood urea nitrogen (BUN), and non-esterified fatty acids (NEFA). The results showed that in Garut calving average rate of 90%, the plasma concentration of hormone progesterone 4.73±0.28 ng/ml and estrogen 24.59±1.91 pg/ml higher than Bogor with an average calving rate of 70%, the plasma concentration of progesterone hormone 3.46±0.71ng/ml and estrogen 21.67±1.57 pg/ml. The concentration of BHBA, BUN, and NEFA for Bogor region respectively was 12.33±1.81 mg dl-1; 23.70±2.40 mg dL; 1.85±0.25 mmol L-1) higher than Garut in a row is 10.17±1.25*mg dl-1, 22.70±2.70mg dL; 1.76±0.37mmol L -1 ). The results of regression analysis showed that the relationship of calving rate (CR) with the concentration of hormones conceptus estrogen (E) and progesterone (P) in garut region has a real form of linear relationship (P<0.05) by following the equation Calving rate=4772 +0.232 Estrogen + 0.643 Progesterone -0.074 BHBA + 0.335 NEFA -0.082 BUN with a coefficient of determination of 43.65%, while for Bogor region according to Calving regression rate=5,590+ 0.010 Estrogen +0.638 Progesterone -0.231 BHBA + 1.11NEFA -0.105 BUN with a coefficient of determination of 16.34%. It was concluded that calving rate is strongly influenced by the concentration of the hormones progesterone and estrogen, as well as having a close relationship with the condition of the mother blood metabolite during the pregnancy.