Makemaharn, Orawan, Suphadtra Phornwilardsiri, Pitak Laokirkkiat, Somsin Petyim, Suphakde Julvijitphong, Singpech Suksompong, and Roungsin Choavaratana. 2008. “A Comparison between Conventional Slow Freezing and Vitrification of Mouse Blastocysts using Cryo-E”. Siriraj Medical Journal 60 (6):349-52. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246509.