人工知能（AI）を用いたウシの生殖評価への応用：卵母細胞および胚盤胞に焦点を当てる

The assessment of oocyte and blastocyst quality plays a pivotal role in reproductive biology, directly influencing the success of assisted reproductive technologies (ART) in both humans and farm animals. In livestock, technologies such as Ovum Pick-Up and In Vitro Embryo Production (OPU-IVEP) have revolutionized genetic improvement strategies by enabling the production of a higher number of genetically superior offspring from elite females. However, the manual evaluation of oocytes and embryos remains subjective, time-consuming, and susceptible to human error. Recent advances in Artificial Intelligence (AI), particularly in computer vision and deep learning, have opened new avenues for automating the assessment process. AI models such as convolutional neural networks (CNNs) have demonstrated high accuracy in classifying oocyte and embryo quality, providing standardized, rapid, and reproducible evaluations. This review focuses on the applications of artificial intelligence in bovine oocyte and blastocyst grading, highlighting its potential to improve assessment accuracy, support OPU-IVEP programs, and enhance reproductive efficiency.