## 3 Results
### Laying Performance  
The hens' weekly laying performance from 34 to 53 WOA is illustrated in Figure 2. The results showed that laying performance parameters including egg weight, egg mass, hen-day egg production, and FCR improved consistently in hens fed the AM/PM diets compared with hens fed the control diet over the study duration. Table 4 presents laying hen performance from 34 to 43 WOA and 44 to 53 WOA. The results showed that egg mass was significantly higher (_p_ = 0.035), and hen-day egg production tended to be higher (_p_ = 0.058) in hens on the AM/PM treatment compared with the control treatment in the first 10 weeks of this study from 34 to 43 WOA. The dietary treatments had no effect on egg weight, daily feed intake, or FCR in this period (Table 4). During the second 10 weeks of this study, hens on the AM/PM treatment had significantly lower feed intake (_p_ = 0.023) and FCR (_p_ = 0.016) compared with hens on the control treatment (Table 4). Over the entire duration of this study (20 weeks), hens on the AM/PM treatment presented an improved FCR (_p_ = 0.030) compared with those on the control treatment. Birds on the AM/PM treatment also tended to have higher egg mass (_p_ = 0.086) and lower feed intake (_p_ = 0.084) compared with those fed the control diet over the entire 20 weeks of this study (Table 4).  
\begin{table}
\begin{tabular}{l l l l l l} \hline \hline \multirow{2}{*}{**Hen Age**} & \multirow{2}{*}{**Variable**} & \multicolumn{3}{c}{**Treatment**} & \multirow{2}{*}{**SEM**} & \multirow{2}{*}{**\(p\)-Value**} \\ \cline{3-3} \cline{5-6}  & & **AM/PM** & & & **Control** \\ \hline \multirow{4}{*}{Week 43} & Hen weight & 2154 & 2152 & 25.34 & 0.956 \\  & Hen weight uniformity & 8.29 & 9.42 & 0.88 & 0.453 \\  & Egg weight & 63.36 & 62.49 & 0.42 & 0.162 \\  & Egg weight uniformity & 7.73 & 7.28 & 0.33 & 0.516 \\  & Hen weight & 2186 & 2176 & 12.14 & 0.542 \\  & Hen weight uniformity & 8.37 & 8.30 & 0.33 & 0.757 \\  & Egg weight & 63.18 & 62.45 & 0.28 & 0.079 \\  & Egg weight uniformity & 6.91 & 8.28 & 0.37 & 0.060 \\ \hline \hline \end{tabular} Data are presented with analyses at the 5% level of significance.  
\end{table}
Table 3: Effect of AM/PM feeding on hen weight, hen weight uniformity, egg weight, and egg weight uniformity at 43 and 53 WOA.  
\begin{table}
\begin{tabular}{l l l l l l l} \hline \hline \multirow{2}{*}{**Study Duration**} & \multirow{2}{*}{**Treatment**} & \multirow{2}{*}{**Egg Weight (g)**} & \multicolumn{2}{l}{**Hen-Day Egg Production (\%)**} & \multirow{2}{*}{**Egg Mass (g)**} & \multirow{2}{*}{**Feed Intake (g)**} & \multicolumn{1}{l}{**FCR**} \\  & & & & & & **(kg Feed/** \\ \hline \multirow{4}{*}{Weeks 34–43} & AM/PM & 62.96 & 95.48 & 60.12 \({}^{\text{a}}\) & 135 & 2.249 \\  & Control & 62.39 & 93.92 & 58.62 \({}^{\text{b}}\) & 141 & 2.397 \\  & SEM & 0.22 & 0.42 & 0.36 & 2.93 & 0.049 \\  & \(p\)-value & 0.206 & 0.058 & 0.035 & 0.372 & 0.136 \\  & AM/PM & 63.67 & 95.34 & 60.71 & 134 \({}^{\text{b}}\) & 2.214 \({}^{\text{b}}\) \\ \multirow{4}{*}{Weeks 44–53} & Control & 63.22 & 94.38 & 59.67 & 147 \({}^{\text{a}}\) & 2.475 \({}^{\text{a}}\) \\  & SEM & 0.29 & 0.78 & 0.60 & 3.70 & 0.068 \\  & \(p\)-value & 0.295