“…Hence, the materials of cold shocks such as egg yolk and soybean lecithin‐based extenders have been applied during storage. For instance, extenders of ram (Khalifa & Khalil, 2016), billy goats (Khalifa, 2015), bull (Gamal, El‐Nattat, El‐Sheshtawy, & El‐Maaty, 2016) and buck (Baruah et al., 2019) had positive sperm parameters in egg yolk‐based extender. As well as, the soybean lecithin‐based extender is used to protect cold shock of ram (Khalifa, Abdel‐Hafez, et al, 2016; Khalifa, Mohamed, et al, 2016), billy goats (Narwade, Mohanty, Bhakat, & Rahim, 2017) and buck (Baruah et al., 2019).…”