For the past decades, it has been apparent that assisted reproductive technologies along with clinical embryology have both propounded themselves triumphantly in the field of medicine. Although high-tech equipment and staff skills are crucial to the success of these breakthrough implementations, the pivot of these practices is updated, knowledgeable and competent technicians who excel in the field of human embryology. Crucially, the advancement of clinical embryology and its related fields depends on the meticulous training of clinical embryologists in practical skills as well as theoretical knowledge. Unfortunately, most aspects of reproductive medicine have no obligatory assembled curriculum. A lot more emphasis has been put on the clinical aspect of these sciences and training than its theoretical counterpart. Consequently, clinical embryologists continue to face difficulty in unifying the needed theoretical knowledge in these fields. Not only that, but they also struggle to shed a light on the advanced knowledge required to stand out as professionals. This study aimed to explore which theoretical information in the science of human embryology that embryologists need to know thoroughly about. The survey was conducted online (July 2021).