Figure 1.
Figure 1.

Example of ultrasound image of the ovaries (a and b, left and right ovary respectively), with the white arrows indicating individual corpus luteum. Panels c and d show the left ovary, and e and f show the right ovary, before dissection. Panels g and h show the individual corpus luteum dissected from left and right ovary, respectively.

 


Figure 2.
Figure 2.

Panel A, predicted relationship between OR assessed by TUS performed by examiner 2 and the OR assessed by TUS performed by examiner 1 [(n = 29), β = 0.87 ± 0.09 CLTUS E1/CLTUS E2, P < 0.0001, farm P = 0.12]. Panel B, predicted relationship between the OR assessed by E1 by TUS and OR after dissection [β = 0.28 ± 0.01 TUS/DIS, P = 0.01, farm P = 0.0002, (n = 45)]. Panel C; predicted relationship between the average diameter of the 10 biggest CL assessed after ovarian dissection and the average diameter of the 10 biggest CL assessed by TUS [(n = 25), β = 1.0 ± 0.07 mm TUS/mm dissected, P < 0.0001]. Panel D, predicted relationship between the OR after dissection and the average CL diameter [TUS = 0.49 ± 0.19 (P = 0.02) – 0.01 ± 0.005 (P = 0.01) and DISS = 0.47 ± 0.18 (P = 0.02) – 0.01 ± 0.004 (P = 0.01)]. Statistical models included the fixed class effect of farm (n = 2, for panels a and b), and the random effect of batch (n = 6). Data points (♦) represent the predicted values estimated as the difference with the model residuals.

 


Figure 3.
Figure 3.

Summary of the differences between the number of corpora lutea (CL) counted with transrectal ultrasonography (ORTUS) and the number of CL counted after slaughter and dissection of the ovaries (ORDIS) in 45 multiparous sows at early pregnancy. Underestimations are shown in light gray and overestimations are shown in dark gray.

 


Figure 4.
Figure 4.

Panel A: estimated least square means for the effect of average CL diameter classes [5.5 to 7.8 mm (n = 23); 7.9 to 8.9 mm (n = 47); and 9.0 to 10.5 mm (n = 30)] on BW of total piglets born [P = 0.04; litter size class P < 0.0001]. Panel B: estimated least square means for the effect of CL diameter classes on standard deviation (SD) of BW of the total piglets born (P = 0.02). Statistical models included the fixed class effect of litter size [LS, 8 to 18 piglets born (n = 35); 17 to 19 piglets born (n = 36) and 20 to 26 piglets born (n = 30)] and its interactions, which were excluded from the models when not significant (P > 0.05). Significant differences between classes are indicated by letters above the columns and the error bars indicate the SE of the estimates.