The dataset includes search results used in article “Impact of pre-breeding feeding practices on rabbit mammary gland development at mid-pregnancy” biorXiv, 2022.01.17.476562, ver. 3 peer-reviewed and recommended by Peer Community in Animal Science. https://doi.org/10.1101/2022.01.17.476562 Search Results Description: Please use Figure 1 from paper to trace the data made available and experimental group. The excel “raw data 2022-06-24” file contains the following data Body weight of each rabbit on a weekly basis Analysis of breeding parameters at mid-pregnancy Histological areas of each mammry tissue measured Optical density values obtained for biochemical leptin concentration determination Optical density values obtained for biochemical triglyceride concentration determination Optical density values obtained for biochemical glucose concentration determination Optical density values obtained for biochemical cholesterol concentration determination RT-qPCR results (Ct) from QuantStudio export for milk protein analysis RT-qPCR results (Ct) from QuantStudio export for lipid metabolism analysisen “Statistical analysis.doc” contained the description of the statistics used in Excel and the description of the linear mixed model analysis , the reference of the script available by the CRAN project is also include.The R scipt file for using the linear mixed model in R added with the "data-croissance-analysis" file.